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+1 Physics Previous (2009-2016) Questions Chapter Wise, , Chapter 1 - Physical World, , b) Weak Nuclear Force, , 1. Which one of the following fundamental, forces in nature binds Protons and neutrons, in a nucleus?, , c) Gravitational Force, , a), b), c), d), , Gravitational force, Electromagnetic force, Strong nuclear force, Weak nuclear force, (1), , [Imp-2013], , Chapter 2, Units and Measurements, [SEPT-2016], , 2. Which one of the following is present, between all object in universe?, a), b), c), d), , d) Electromagnetic Force, , Electromagnetic force, Magnetic Force, Gravitational force, Strong nuclear force, (1) [March 2016], , 3. Choose the WRONG statement from the, following statements., a), Electromagnetic force is the force, between charged particles., , 1. a) Length of a sheet is 17.3  0.3cm and, breadth is 3.12  0.08cm. Calculate the, percentage error in the area., (2), b) Using the principle of homogeneity of, equations, check whether the equation is, correct. T  2, , g, l, , T  time, g  acceleration, l  length, , (2), , [SEPT-2016], , b) Electrostatic force can be attractive or, repulsive., , 2. a) The error in the measurement of, radius of a circle is 0.6%. Find the, percentage error in the calculation of the area, of the circle. (2), [March 2016], , c), Nuclear force binds protons and, neutrons in a nucleus., , b) Name the principle used to check, the correctness of an equation. (1), , d), Gravitational force is one of the, strongest forces among fundamental forces in, nature., (1), [Imp 2015], , c) What is the number of significant, figures in 0.00820 J? (1), , 4. Choose the correct answer from the, brackets:, [March 2015], a) Weakest force in nature is...... (1), (Strong nuclear force,, Electromagnetic force,, Gravitational force, Weak nuclear force), b) 980 F = .............K, (36.7, 40, 309.7, 371), 5. The weakest force found in nature, a) Strong Nuclear Force, , (1), (1), , 3. The correctness of equations can be, checked using the principle of homogeneity., a) State the principle of homogeneity. (1), b) Using this principle, check whether the, following equation is dimensionally correct., , 1 2, mv  mgh, 2, Where m is the mass of the body, v is its, velocity, g is the acceleration due to gravity, and h is the height., (2), c) If percentage errors of measurement in, velocity and mass are 2% and 4%, , Saju K John M.Sc. Physics, NET, Doctoral Research Fellow at NIT Calicut, , Page1

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+1 Physics Previous (2009-2016) Questions Chapter Wise, respectively, what is the percentage error in, kinetic energy?, (1) [Imp 2015], 4. a) Suggest a method to measure the, diameter of the Moon., (1), b) Length, breadth and thickness of a, block is measured using Vernier callipers. The, percentage errors in the measurements are, 2%, 1% and 3% respectively. Estimate the, percentage error in its volume., (1), c), , A physical quantity is given by, , Fv 2, h, . F is the force, v is the velocity, L, and L is the angular momentum. Find the, dimensions of h . (2), [March 2015], , 9. Velocity of sound depends on density (p), and modulus of elasticity (E). (the, dimensional formula of E is ML-1T-2)., a) State the principle of homogeneity, b) Using the above principle, arrive at an, expression for the velocity of sound. (Take, K=1)., [March-2013], 10., , a) Which measurement is most precise?, , i., ii., iii., , Vernier Calipers having 5 divisions, on sliding scale., Vernier Calipers having 10 divisions, on sliding scale., Vernier Calipers having 20 divisions, on sliding scale., , 5. Dimensional method helps in converting, the units from one system to another. (1 + 2), , b) What happened to the accuracy when, the least count is decreased?, [Imp-2012], , a) Name the principle used for the above, purpose., b) Using dimensions, prove, , 11. a) A boy recalls the relativistic mass, , 1 Newton=105 dyne., , [Imp-2014], , 6. The correctness of an equation is checked, using the principle of homogeneity., For an equation x  a  bt  ct 2,, where x is in metre and t in second. What will, be the dimension of ‘b’? (1), [Imp-2013], 7. Significant figures determine the accuracy, of the measurement of a physical quantity., a) The radius of a sphere is given by, R=1.03m. How many significant figures are, there in it?, (1), b) If the percentage error in calculating the, radius of the sphere is 2%  what will be the, percentage error in calculating the volume?, (1), , [Imp-2013], , 8. Pick out the fundamental unit from the, following:, , m0, , wrongly as m , , 1V 2, , . Using dimensional, , method put the missing ‘C’ at the proper, place., b) Name and state the principle used in, solving the above problem., [Imp-2012], 12. Select the correct answer:, a) Light year is the unit of..........., i) time, , ii) length, , iii) year, , iv) velocity, , b) kilowatt-hour is the unit of ........., i) energy ii) power, iii) time, , iv) mass, , [March 2012], , 13. All physical quantities can be expressed in, terms of dimension., a) Write the physical quantities of the, following dimensions:, i) [ M 1 L 1 T, , -1, , ], , ii) [ M 1 L 2 T, , -2, , ], , Second, m/s, Newton, Joule [March-2013], b) Check whether the equation, , Saju K John M.Sc. Physics, NET, Doctoral Research Fellow at NIT Calicut, , Page2

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+1 Physics Previous (2009-2016) Questions Chapter Wise, b) A dimensionless physical quantity, but having unit in SI system., c) Two physical quantities which have, the same dimensions. [ Imp – 2010], , m, is dimensionally correct., g, , T  2, T , , Time period of a simple, Pendulum., m  mass of the bob., g  acceleration due to gravity., [March 2012], 14. To measure distance we use different, units. Which of the following is the largest, unit of the length?, a), b), c), d), , Kilometre, Astronomical unit, Light year, Parsec, , 19. A company manufacturing PVC pipes, claims in an advertisement that the volume of, water flowing out through the pipe in a given, time is as per the equation V = KA2ut where, A is the area of cross section of the pipe, u is, the speed of flow, t is the time and K is a, dimensionless constant., a) Name the principle that can be used to, check the dimensional correctness of, this equation., b) Check the equation and state whether, the claim can be correct., [ Imp – 2010], , [Imp-2011], , 15. Which of the following measurement is, more accurate? Why?, i., ii., iii., , 20., , 500.00kg., 0.0005kg., 6.00kg., , [Imp-2011], , 16. a) Pick out the odd one in the given pairs., i., ii., iii., iv., , Angular velocity and frequency., Work and energy., Angle and strain., Impulse and momentum., , b) 1 light year = ......... m, [March – 2011], 17. a) A student was asked to write the, equation for displacement at any instant in a, simple harmonic motion of amplitude ‘a’. He, wrote the equation as y  a sin, , Mechanical power is represented by, , P  Fv  Av3  where, F is the force, v is the, velocity, A is the area and  is the density., a) The dimensional formula of power, is............, b) Check the dimensional validity of the, above equation., c) Which of the following equations, can’t be obtained by the dimensional, method?, i., ii., iii., , E  kmv 2, P  h g, , iv., , N  N 0 e  t, , 2 v, t. Where, k, , ‘v’ is the velocity at instant’s’. For the, equation to be dimensionally correct, what, should be the dimensions of k?, b) What is the area of a square of side 1.4, cm in proper significant figures?, [ March – 2011], 18. Give examples for the following:, , T  K l lg, , [March 2010], 21. Match the following:, Coefficient, a of viscosity, , ML-1 T-2, , Force / area, number, M-1L3 T-2, , Gravitational, b constant, , Force / area, velocitygradient, , Modulus of, c elasticity, , Force  (dis tan ce), M L-1 T-1, (mass) 2, , a) A dimensionless, unit less physical, quantity., , Saju K John M.Sc. Physics, NET, Doctoral Research Fellow at NIT Calicut, , [ Imp – 2009], , Page3

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+1 Physics Previous (2009-2016) Questions Chapter Wise, 22. Fill in the blanks:, a) I micron =.................m., b) Hertz is the unit of ............., , 2. Velocity – time graph of an object is, given below. [March 2016], , [MARCH-2009], 23. a) A student writes the equations for the, relativistic variation of mass with velocity as, , m0, , m=, , 1, , x2, c2, , Where ‘mo ’ is the rest mass and ‘c’ is the, speed of light. What is the dimensional, formula for ‘x’?, b), If the percentage error in the, measurement of radius ‘R’ of a sphere is 2%,, then what is the percentage error in its, volume?, [MARCH-2009], , Chapter-3, Motion in a Straight Line, 1. Velocity – time graph of a body is given, below., , a) What type of motion is indicated by, the above graph? (1), b) Derive a relation connecting the, displacement and time for this type, of motion. (2), c) The ratio of velocity to speed of an, object is...................., i. One, , ii. Greater than one, , iii. Less than one iv. Either less than, one or equal to one. (1), 3. Figure 1 shows displacement-time graph of, runner A. Figure 2 shows velocity-time graph, of runner B., a) Identify the type of motion the runner A, has., i) Uniform motion ii) Non-uniform motion, iii) Accelerated motion, iv) Jerking motion, , (1), , b) Derive a mathematical relation that, connects displacement, velocity and time for, runner A., (2), a) Which portion of the graph, represents uniform retardation?, (i) OA (ii)AB (iii) BC (iv) OC (1), , c) Analysing the above two graphs, find, which runner will win the race. Why?, , b) Find the displacement in time 2s to, 7s., (1), c), , A stone is dropped from a height h., Arrive at an expression for the time, taken to reach the ground., (2), [SEPT-2016], (Here θ1> θ2)., , Saju K John M.Sc. Physics, NET, Doctoral Research Fellow at NIT Calicut, , (1), , [Imp 2015], , Page4

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+1 Physics Previous (2009-2016) Questions Chapter Wise, 4. Position – time graph of a body is given., , 7. Acceleration – time graph of a body is, shown below:, , a) Drawn the corresponding velocity-time, graph., b) What does the area under the velocity –, time graph represent?, c) Arrive at a relation connecting velocity, (v) and time (t) for a uniformly, accelerated body. (1+1+2) [Imp-2013], a), , Estimate the velocity during the time, interval t = 2s to t = 3s., (1), b) Displacement of an object is, proportional to t3. Show that its, acceleration is increasing with time., (2), [March 2015], , 8. Figure given below shows the motion of a, school bus starting from the point O and, travels along a straight line., , 5. Velocity is defined as the rate of change of, displacement., a) Distinguish between average velocity, and instantaneous velocity., b) When does the average velocity, becomes equal to the instantaneous, velocity?, , a) Complete the following table, Time taken, 2s, 10s, , Velocity, .............., 5m/s, , b) Is the motion of the bus uniform or, non-uniform? Justify your answer., c) Draw the position – time graph of the, above motion., d) A student in the school bus notices the, speedometer of the bus. Which type of, speed is shown by the speedometer?, [March-2013], , c) A car travels from A to B at 60 km/hr, and returns to A at 90 km/hr. What is its, average velocity and Average speed?, (2+1+2) [Imp-2014], 6. Acceleration is defined as the rate of, change of velocity., a) Is it possible for a body to have, acceleration, without, velocity?, Explain., b) Draw the velocity – time graph of a, body, moving, with, uniform, acceleration ‘a’ and initial velocity, Vo., c) Using the above graph, obtain the, equation for displacement in time ‘t’., (1+ 1+ 2) [March 2014], , Displacement, from 0, 10-0=10m, ................, , 9. a) State in the following cases whether the, motion is one, two or three dimensions., i., ii., , A butterfly flying around a flower., A bus moving along a long and, straight road., , b) Derive the equations of motion for nonuniform motion in one dimension., c) Look at the graph in fig. (a) and fig.(b), carefully and state which of these can’t, , Saju K John M.Sc. Physics, NET, Doctoral Research Fellow at NIT Calicut, , Page5

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+1 Physics Previous (2009-2016) Questions Chapter Wise, possible represent one-dimensional motion, with reasons., [Imp-2012], , 10. A car is moving along the circumference, of a circle of radius r., a) What is the distance travelled in one, revolution?, b) What is the displacement in one, revolution?, c) What is the speedometer of the car, measure?, d) Can a body have acceleration, without velocity. Explain., , whether it can represent one-dimensional, motion., [Imp-2011], , 14. a) The figure shown the position – time, graph of a body moving along a straight line., , i., , [Imp-2012], 11. Acceleration – time graph of a body starts, from rest as shown below:, , ii., , Draw the velocity-time graph of the, body., From the graph, find the displacement, in 20 seconds., , b) From the velocity-time graph of a body, moving with uniform acceleration, deduce the, velocity-time relation and the velocitydisplacement relation., [ March – 2011], 15. When breaks are applied on a moving, vehicle, it stops after travelling a distance., This distance is called stopping distance., a) What is the use of the acceleration-time, graph?, b) Draw the velocity – time graph using the, above graph., c) Find the displacement in the given, interval of time from 0 to 3 seconds., [March-2012], 12. Acceleration is the time rate of change of, velocity. Give an example of a body, possessing zero velocity and still accelerating., [Imp-2011], 13. Graph representing the motion of two, bodies are shown below. State with reason, , a) Write an expression for stopping, distance in terms of initial velocity (u), and retardation (a)., b) If the initial speed is doubled keeping, the retardation same, by how much, will the stopping distance change?, [March – 2011], 16. If v is the velocity and a is the acceleration,, give an example of a physical situation for, each of the following cases., a), b), c), d), , V  0, a = 0, V = 0, a  0, V > 0, a < 0, V < 0, a > 0, , [ Imp – 2010], , 17. A ball is thrown horizontally from the top, of a tower with a velocity of 40 ms-1. Take g, = 10 ms-2., , Page6

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+1 Physics Previous (2009-2016) Questions Chapter Wise, a) Find the horizontal and vertical, displacement after 1,2,3,4,5 seconds,, then the path of the motion of ball., b) If the ball reaches the ground in 4, seconds, find the height of the tower., [March 2010], 18. a) Acceleration is the time rate at which, velocity of a body changes. Show that for a, car, moving with constant acceleration for a, period of time, the distance travelled in the, second half is three times of that in the first, half., b) The acceleration caused by the earth’s, attraction towards its centre is known as, acceleration due to gravity. It is always, directed towards the centre of earth. Show that, in the absence of air resistance, for a ball, thrown upwards, the time of ascent is equal to, the time of descent., c) Shown that when air resistance is also, taken into account, the time of descent is, greater than the time of ascent., [ Imp – 2009], 19. a ) A ball thrown vertically upwards from, the top of a tower with a velocity V. Another, ball is thrown vertically downwards with the, same velocity V. Which ball will hit the, ground with greater velocity?, b) A boy drops a ball through the window, of a train, which is moving with the uniform, velocity. What will be the path of the ball as, observed by, 1. The same boy sitting in the train?, 2. Another boy standing on the platform?, and, 3. A third boy sitting in a train moving in, the opposite direction on a parallel, track?, [ Imp – 2009], 20. a) To describe the motion of a body we, require a frame of reference. What are the, inertial and non-inertial frames of references?, b) Can a frame of reference fixed at a point, on the surface of earth be truly inertial? Why?, , 21. In situations demanding our immediate, action, normally it takes sometime before we, really respond. This time is known as reaction, time. A truck is moving forward at a constant, speed of 20 m/s. The driver sees a car in front, of him at a distance of 110 meters stopping, suddenly. After a reaction time he applies the, brakes which give the truck an acceleration of, -3 m/s2. What will be the maximum allowable, reaction time to avoid a collision and what, distance the truck would have moved before, the brakes take hold?, [ Imp – 2009], 22. Motion is common to everything in the, Universe. It is the change of position of an, object with time., (a) The slope of position – time graph of a, particle gives:, A. Acceleration, , B. Displacement, , C. Velocity, , D. Momentum, , (b) Give an example of a body possessing, zero velocity and that is still accelerating., (c) A car starts accelerating from rest for, some time, moves with a uniform velocity for, some time and comes to rest with a uniform, retardation. Draw the velocity time graph of, the car., (d) A car covers the first half of the, distance between two places at a speed of, 40kmph and the second half at 60kmph., Calculate the average speed of the car., [MARCH-2009], , Chapter 4, Motion in a Plane, 1. a) Identify the scalar quantity from the, following alternatives., (i) Momentum, , (ii) Work, , (iii)Torque, , (iv) Acceleration, , [ Imp – 2009], Page7, , (1)

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+1 Physics Previous (2009-2016) Questions Chapter Wise, b) A man throws a stone up into air at an, angle ' ' with the horizontal. Draw the path, of the projectile and mark directions of, velocity and acceleration at the highest, position., (2), , 4. A body is projected into air at an angle θ, with the horizontal., a) What is the trajectory followed by this, projectile?, , c) Derive an expression for the maximum, height reached by the stone., (2), , [SEPT-2016], , 2. Observe the following diagram., , i) Ellipse, , ii) Parabola, , iii) Straight line, , iv) Circle, , (1), , b) Give a mathematical proof for your, answer., (2), c), , Trajectory of a body in a projectile, , motion is given by y  x , , x2, . x and y are in, 80, , meters. Find maximum height of this, projectile., (2), [Imp 2015], 5. A stone is, thrown with the, help of a sling, with, initial, ,   , , a) The forces F1 , F2 , F3 are together, called ............., (1), b) Calculate the mass of the stone using, the parallelogram law of vector, addition. (2), [SEPT-2016], 3. When a body is projected into air with, certain initial velocity making an angle with, the horizontal, it will travel in a parabolic, path. [March 2016], a) What are the vertical and horizontal, components of velocity? (1), b) With a diagram, derive an expression, for :, i., Maximum height, ii., Time of flight., (4), c) A ball is dropped through the, window of a train travelling with, high velocity, to a man standing near, the track. The ball............., i.Falls down vertically, ii.Moves straight horizontally, iii.Follows an elliptical path, iv.Follows a parabolic path (1), , velocity v0 at an, angle  from, the horizontal., a) Working of sling is based on..........., law of vector addition., (1), b) With the help of a vector diagram,, state this law., (1), c) Derive the expression for the, maximum height reached by the, stone., (1), [March 2015], 6. Projectile is a particle which is projected, into the air with an initial velocity against the, gravity., (1+1+2), a) What is the angle of projection for, maximum horizontal range?, b) Draw the trajectory of a projectile., c) Obtain the expression for time of flight., [Imp-2014], 7. Uniform circular motion is a special case, of two – dimensional motion having, centripetal acceleration. (1+ 1+ 1), a) Define centripetal acceleration., , Page8

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+1 Physics Previous (2009-2016) Questions Chapter Wise, b) Can a body have acceleration with, constant speed? Explain., c) Express angular velocity in terms of, angular displacement., [Imp-2014], 8. The centripetal force on a body in circular, motion is given by F , , mv 2, . (1+ 1+ 1), r, , a) Write the dimension of force., b) Using the above formula, write an, equation to find % error in centripetal, force., c) What is the number of significant, figures in 0.050 N? [March 2014], , b) A particle is projected with a velocity, ‘u’ in the direction making an angle , with the horizontal. Find., 1) Time of flight, 2) Maximum height, c) A man can jump on moon six times as high, as on earth. Why?, [Imp-2013], 11. An athlete jumps at an angle of 300 with a, maxim um speed of 9.4m/s., a) What is the shape of the path followed by, the athlete in the jump?, b) Obtain an expression to calculate the, horizontal range covered by the athlete., , 9. A and B are two objects moving with, , c) Find the range covered by him in the above, jump. Suggest the angle by which the athlete, can attain the maximum range. [March 2013], , a) What is the velocity of A relative to, B?, (1), b) Rain is falling vertically with a speed, of 35 m/s. A woman rides a bicycle, with a speed of 12 m/s in the east to, west direction. What is the direction, in which she should hold her, umbrella?, (3), c) Assertion: the range of a projectile, remains the same for the angle of, projection 300 and 600., (1), , 12A. a) Find whether the given vectors, , , , velocities VA and VB ., , Reason: the range does not depend on, the angle of projection., Choose the correct answer:, A: Both assertion and reasons are, correct., B: Both assertion and reason are, wrong., C: Assertion is correct, but reasons, are wrong., D: Assertion is wrong, but reason is, correct., [March 2014], 10. A stone is thrown upward from a moving, train., (1+3+1), a) Name the path followed by the stone., , 2iˆ  3 ˆj  4kˆ and 4iˆ  6 ˆj  8kˆ are parallel, or not., b) What are orthogonal unit vectors?, c) What is zero vector? Give its, significance in Physics with an example., OR, 12B. a) Obtain expression for Time of flight, for a projectile motion., b) What is the angle of projection for, maximum horizontal range?, c) The ceiling of a long hall is 25m, high. What is the maximum horizontal, distance that the ball thrown with a speed of, 40 m/s can go without hitting the ceiling of the, hall?, [Imp-2012], 13. A parallelogram law helps to find the, magnitude and direction of the resultant of, two forces:, a) State the law., b) If the magnitude of two vectors and, their resultant are the same, what is the angle, between the two vectors?, c) Determine the value of, Page9

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+1 Physics Previous (2009-2016) Questions Chapter Wise,  , ,  , ,  A  B  A  B ., , [March 2012], , 14. A boy throws a cricket ball with a velocity, u at an angle  with the horizontal., a), b), , c), , Name the path followed by the ball., At the highest point, what are the, vertical and horizontal components of, velocity?, Derive an expression for the, maximum height reached by the ball., , (d) If  1 = 300, what is the value of  2?, , attained by the ball above the point of, projection? (Take g = ms-2)., c) In the figure, the point ‘P’ on a wheel, of radius ‘R’ is in contact with the, ground. What is the displacement of, the point, when the wheel rolls a half, revolution?, , [March – 2011], , , , 18. A stone is thrown up with the velocity u, which makes an angle  with the horizontal., , [March 2012], 15. A food packet is dropped from a plane, flying horizontally., a) Sketch the path of the falling food, packet., b) If the time taken by the packet to, reach the earth’s surface is ‘6’, seconds, calculate the height from, which the packet is dropped., (Take g = 10m/s2), [Imp-2011], 16. A physical quantity having both, magnitude and direction is a vector and if has, only magnitude it is a scalar. Categories the, following physical quantities into scalars and, vectors., a), b), c), d), , Force, Angular momentum, Time, Work, [Imp-2011], , 17. Motion along a plane is called twodimensional motion. A body moving in two, dimensions is found to have acceleration in, one dimension., a) Identify the motion., b) A ball thrown by a player reaches, another player reaches another player, in 2s. What is the maximum height, , a) What are the magnitudes of the, vertical and horizontal components of, velocity?, b) How do these components change, with time?, c) After ‘t’ seconds what will be the, magnitude and direction of the, resultant velocity?, [ Imp – 2010], 19. Ramesh observes the motion of an insect, in a circle. He finds that it travels 6 revolutions, in an anticlockwise direction for a time of, 31.4sec., a) Find the angular velocity of the, insect., b) If the insect travels, 4 revolutions in the clockwise, direction for a time of 8.6sec, what, will be the angular speed averaged, over the total time?, c) Obtain the expression for centripetal, acceleration (ac) in terms of angular, [March 2010], speed (  )., 20. Imagine yourself in a rain steadily falling, vertically with a speed of 2ms-1., a) If you start moving with 1ms-1 due, east, in which direction should you, hold the umbrella to protect yourself, from the rain?, b) On a sunny day at 12 noon, you hold, the umbrella vertically. If you run at, , Page10

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+1 Physics Previous (2009-2016) Questions Chapter Wise, certain speed, do you need to incline, the umbrella? Justify your answer., [March 2010], 21. a) A body, moving along a circle has, uniform speed but the velocity is varying. This, is because of the centripetal acceleration of, the body. From the relationship between, linear and angular velocities, find the, relationship between linear and angular, accelerations., b) Find the angular velocities of the, minute and second hands of a clock., c) A ball trapped in a circular path of, radius 10 cm moves steadily and completes, 10 revolutions in 100 seconds. What is the, angular velocity and what is the linear, velocity of its motion? Is the acceleration, vector is a constant vector? [ Imp – 2009], 22A. a boy throws a cricket ball with a, velocity ‘u’ at an angle ‘0’ with the horizontal., a) What is the path followed by the ball?, b) At the highest point, what are the, vertical and horizontal components, of velocity?, c) Derive the expressions for ‘time of, flight” and ‘horizontal range’ of the, ball., OR, , , , 22B. A and B are two non-zero vectors., , , ,  , , , , a) If A  B = A . B , what is the angle, , , , , , between A and B ?, , , , , , , , , , , , b) Find the value of A . A  B ., c) The parallelogram law is used to find, the resultant of two vectors. Find the, magnitude of the resultant of these, two vectors in terms of their, magnitudes and the angle between, them., [MARCH-2009], , Chapter -5, Laws of Motion, 1. A person drives a car along a circular, track on a level ground., a) Derive an expression for the, maximum safe speed of the car., (2), b) Why do we give banking to curved, roads?, (1), [SEPT-2016], 2. When a horse suddenly starts moving, the, rider fails backward. [March 2016], a) Name and state the law used to, explain the above situation. (2), b) State the law of conservation of, linear momentum and prove it on the, basis of second law of motion. (2), c) State true or false., An iron ball and a wooden ball of the, same radius are released from a height, in vacuum; the iron ball will reach the, ground first. (1), 3. A circular track of radius 400m is kept, with outer edge raised to make 5 degrees with, the horizontal. (1+3+2), a) What do you call this type of construction, of tracks?, b) Obtain an expression for the maximum, permissible speed considering the, force of friction., c) Calculate the permissible speed of the car, if the coefficient of friction is 0.2., [Imp-2013], 4. The given graph ABCD shows variation, of force with time for a body placed on a, smooth horizontal surface., , Page11

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+1 Physics Previous (2009-2016) Questions Chapter Wise, a), , Using the given graph, state whether the, following statements are true or false., i), The force acting on a body along, AB is constant., ii), The force acting on a body along, CD is zero., (2), b) i), State the law of conservation of, linear momentum., iii), Find the region on the graph at, which the body moves with, constant momentum., (2), iv), Draw a momentum time graph, for the given graph., (1), [Imp 2015], , 5. a) State the following statements are True, or False. Correct the statements if false., (2), i., , ii., , A spring balance gives the mass of a, body while a common balance gives, its weight., If the same force is applied on two, bodies of different masses for the, same time, then the change in, momentum of two bodies is the same., , b) State Newton’s second law and arrive, at the equation of force., (2), c) A motorcycle and a bus are moving, with same momentum. Which of them has, greater kinetic energy? Justify., (1), [March 2015], 6. Newton formulated the famous laws of, motion., a) Give the significance of Newton’s, first law., b) Action and reaction are equal and, opposite, yet they do not cancel each other., Why?, [Imp-2014] (1 + 1), 7. Friction is defined as the force which, opposes the relative motion between two, surfaces in contact., (2+ 1+ 3), , c) Obtain an expression for maximum, speed on a banked road without considering, friction., [Imp-2014], 8. We are familiar with Newton’s laws of, motion., a) State Newton’s second law of motion., (1), b) Using the above law, explain:, i., Impulse, –, momentum, principle, ii., Law of conservation of linear, momentum, (1), c) A circular racetrack of radius 300 m, is banked at an angle of 150 . The, coefficient of friction between the, wheels of a race car and the road is, 0.2. Find:, i., The optimum speed of the race car to, avoid wear and tear on its tyres. (1), ii., Maximum permissible speed to avoid, slipping. (2), [March 2014], 9. Match the following., Sl, No, 1, 2, 3, 4, , A, Newton’s, first, law, Conservation of, linear, momentum, Newton’s third, law, Impulse, , B, Change, momentum, Action, reaction, , in, , , , Law of inertia, Momentum, before collision=, Momentum after, collision, [March-2013], , 10A) According to Newton’s law of motion,, the force depends on the rate of change of, momentum., a) Name the law that helps to measure, force., b) Using the above law, deduce an, expression for force., , a) Friction is a necessary evil. Explain., b) What is meant by banking of roads?, , Page12

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+1 Physics Previous (2009-2016) Questions Chapter Wise, c) A man jumping out of a moving bus, falls with his head forward. What should he, do in order to land safely., 10B) The outer side of a circular track of, radius 200 m is raised to make an angle of 150, with the horizontal., a) Which force provides the necessary, centric petal force for a car taking the circular, track?, b) Name the process by which the outer, side of a curved track is raised a little above, the inner side., c) Using the data provided in this case,, determine the maximum permissible speed to, avoid skidding (given  s = 0.25 )., [March-2013], 11. Write the reason for the following:, a) Action and reaction are equal and, opposite. Yet they do not cancel each, other., b) A cricketer moves his hands, backwards while holding a catch., [Imp-2012], 12. According to Newton’s law of motion, the, force depends on the rate of change of, momentum., a) State whether the force is external or, internal? Justify your answer., b) What happens to the linear, momentum when the force is absent?, c) The motion of a particle of mass m is, described, , y  ut , , 14. When a short is fired from a gun, the dun, is moved in the backward direction. (1+ 2), a) State the principle behind it., b) Prove the principle using Newton’s, second law of motion., [Imp-2011], 15. Friction is a force acting between two, surfaces in contact; when there is a relative, motion between them. Consider a car moving, over a horizontal road. What will be the, direction of frictional force acting between the, road and tyre? (1), [Imp-2011], 16. A stone breaks the window glass into, pieces while a bullet almost pierces through, the same. Give reason. (1), [Imp-2011], 17. Banking of road helps to increase the, centripetal force and there by increases the, limit of maximum speed of a vehicle w2ith it, can take the curve., (1+ 1), a) Sketch the schematic diagram of a, vehicle on a banked road and mark, the various forces acting on it., b) Give the expression for the maximum, allowed speed of a vehicle on a, banked road with friction., [Imp-2011], 18. A block of mass ‘M’ is suspended by a, light cord ‘C’ from the ceiling and another, strong cord ‘D’ is, attached to the bottom, of the block as shown., , 1 2, gt . find the, 2, , force acting on the particle., d) Why is it more difficult to rotate a, stone by tying it to a longer string than, a shorter string? [March 2012], 13. A thief jumps from the top of a house with, a box of weight 25kg.wt. on his head. What, will be the weight of the box experienced by, the thief during his downward fall? Justify, your answer., [Imp-2011], , The cord ‘D’ is pulled by a force ‘F’. Which, of these cords will break, if, a) The force is increased steadily?, b) The force is increased suddenly?, [March – 2011], 19. Raising the outer edge of a curved road a, little above the inner edge is called banking of, curves., Page13

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+1 Physics Previous (2009-2016) Questions Chapter Wise, a), Derive an expression for the safe, speed with which a car can negotiate a banked, road by taking into account the friction, between the tyres and the road., b) A machine gun fires bullets of mass, 40 g each with a speed of 1200 ms-1. The, person can hold the gun with a maximum, force of 144 N. What is the maximum number, of bullets that can be fired per second from the, gun?, [March – 2011], 20. A man is standing at the centre of a large, flat slab of ice. He can get himself to the edge, of the slab by spitting or blowing air in the, forward direction (assuming the ice to be, frictionless), a) Name the principle/law involved in, this., b) A horse cannot pull a cart and run in, empty space. Why?, c) With the help of a free body diagram, represent the various forces acting on, a vehicle moving on a banked road., Neglecting frictional force obtain the, expression for the maximum safe, speed of the vehicle on the banked, road., [ Imp – 2010], 21. A passenger of mass 30 kg is standing in, a lift which is moving vertically downwards, with an acceleration of 1.8 m/s2, a) Will the passenger experience, decease or an increase in his weight/, Explain?, b) What will be the effect if the cable is, cut and the lift falls freely?, [March 2010], 22. There are different types of forces in, nature. We learnt their effects and, applications. Give the exact reasons for the, following., a) Why can’t a horse pull a cart in empty, space?, b) Why are passengers thrown forward, when a speeding bus stops suddenly?, [March 2010], 23. A child is sitting inside a lift in a multistoreyed building., , a) What will happen to the weight of the, child if?, i., The lift moves up with a, constant speed?, ii., The lift moves up with a, constant acceleration?, b) Write down expressions for the, apparent weight felt by the child when the, lift is:, i., ii., , ascending., Descending with a uniform, acceleration., , c)If the child weighs 20kg and if the lift is, moving down with a uniform acceleration, of 5ms -2, what will be the apparent weight, of the child?, (g = 10ms-2)., , [MARCH-2009], , Chapter -6, Work, Energy and Power, 1. a) State the work energy theorem., , (1), , b) Show that the potential energy of a, body is completely converted into kinetic, energy during its free fall under the gravity., (2), c) A man carefully brings down a glass, sheet from a height 2 m to the ground. The, work done by him is ................., (i) negative, (iii) positive, , (ii) zero, (iv) unpredictable, , (1), , [SEPT-2016], 2. Force is required to lift a body from the, ground to a height h and work is measured, as the product of force and magnitude of, displacement., a) Name the energy possessed by the, body at maximum height. Write an, equation for it. (2), b) A man of mass 60 kg carries a, stone of mass 20 kg to the top of a, Page14

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+1 Physics Previous (2009-2016) Questions Chapter Wise, multi-storeyed building of height, 50m. Calculate the total energy, spent by him? (9.8m/s2 ) (2), [March 2016], 3. The figure shows a body of mass m placed, at a height h. A, B and C are the three points, on the trajectory of this body., , a) Which is the type of energy possessed by, this body at a height h?, (1), b) Prove that total mechanical energy is, conserved at B and C., (2), c) A body of mass 5kg is thrown vertically, up with a kinetic energy of 490 J. Find the, height at which the kinetic energy of the body, becomes half of the original value., (2), [Imp 2015], 4A. The scalar product of force and, displacement gives work. It can be negative,, zero or positive., a) The work done in sliding a load is, ......... with respect to frictional force., (zero, positive, negative, infinity), (1), b) State and prove the work energy, theorem for constant force., (2), c) A pump on the ground floor of a, building can pump water to fill a tank, of volume 30 m3 in 15 minutes. If the, tank is 40 m above the ground and the, efficiency of the pump is 30%, how, munch electric power is consumed by, the pump?, (2), , a) When two object collide, after, collision they could move together,, the collision is........, (1), (elastic, completely elastic, inelastic,, completely inelastic), b) Show that in a perfectly elastic, collision in one dimension, relative, velocity after collision is equal to, relative velocity before collision. (2), c) A ball at rest is dropped from a height, of 12 m. It loses 25% of its kinetic, energy on striking the ground. Find, the height at which it bounces. (2), [March 2015], 5. Below figure represents two point masses,, m1 and m2 approaching each other with speeds, u1 and u2. Let them undergo one-dimensional, collision and retrieve each other with, velocities v1 and v2., , Show that (u1 - u2 ) = - (v1 – v2)., i.e. before and after collision, their relative, velocities are equal. (3), [Imp-2014], 6. From the table given below:, 2, , 4, , 6, , 8, , 10, , Displacement(M) 1, , 2, , 3, , 4, , 5, , Force(N), , a) Draw the force –displacement graph., b) How can you find the work done from, the above graph?, c) Suggest any two situations in which, the work done by a force is zero., d) A ball is pushed with a force of 3N for, 2s along a frictionless track. The, graph shows the force on the body, against time., , OR, 4B. Several such as billiards, marbles, or, caroms involve collisions., , Page15

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+1 Physics Previous (2009-2016) Questions Chapter Wise, How much work is done by the force?, (1+ 1+ 1+ 2), , [March 2014], , 7. A car is moving with a constant speed on, straight line, a) What is the network done by the external, force on the car?, b) State work energy theorem., c) A bullet of mass 10g and velocity 800 m/s, is passed through a mud wall of thickness 1 m., Its velocity reduces to 100m/s. Find the, average resistance offered by the mud wall., (1+2+3), , [Imp-2013], , 8. Fill in the blanks., a), b), c), d), e), f), , ..........., , , , F.S, Mass, m Momentum,, m, ............., Momentum, collision conserved, Unit of ............, power, Body of At a height,, mass, m, h, Power, p P=........, , Scalar, quantity, KE=......., Energy, conserved, 746watt, , [Imp-2012], 11. Fill in the blanks:, a), water Potential, stored in a energy, dam, b) ........, Kinetic, energy, , ............, , c)Mass=10k Accelera, g, tion, d)Lift falls a=g, freely, , Force=10N, , 9. a) State and explain the work done in the, following situations:, i) A person carrying a heavy load walks, on a level road., ii) A man spending his energy by, pushing on a concrete wall., b) A constant force of 200 N displaces a, body through 5m in the direction of the force., Find the work done on the body., [March-2013], 10. a) State and prove that the law of, conservation of energy for a freely falling, body., b) Draw graphically the variation of, kinetic energy and potential energy with the, height of the body in the above case., , 1, mv 2, 2, , R=.........., [March 2012], , 12. Work is required to lift a body through a, height from the ground., a) Calculate the work done in lifting a, body of mass 10 kg to a height of 10, m above the ground., b) State and prove the law of, conservation of energy of a freely, falling body., c) Draw the variation of KE and PE with, the height of the body., , PE=…….., , Scalar, product, [March2013], , E, , [March 2012], 13. A force is required to do work. The work, done by a force is the product of displacement, and the component of force in the direction of, displacement. Prove this statement., [Imp-2011], 14. Consider a body falling freely through the, atmosphere. Neglecting the air resistance, prove that the total mechanical energy of the, body remains constant throughout the fall., [Imp-2011], 15. Ramesh lifts a body of mass ‘m’ to a, height ‘h’ near the surface of the earth in a, time ‘t’., a) Draw the force-displacement graph., b) If ‘A’ is the area of the graph, what, ,  A,  indicate?, t , , quantity does , , [March – 2011], , Page16

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+1 Physics Previous (2009-2016) Questions Chapter Wise, 16. According to the work-energy theorem,, work done by a force on a body is equal to, change in its kinetic energy., a) A lorry and a car moving with a same, kinetic energy are stopped by, applying breaks which provides the, same retardation. Which of them will, come to a rest in a shorter distance?, Explain., b) If the kinetic energy of a body is, doubled, what is the percentage, change in its linear momentum?, [March – 2011], 17. A ball moves along a circle under the, influence of centripetal force., a) What is the work done by the, centripetal force on the ball?, b) An arrow shot from a bow has kinetic, energy. How does it get this kinetic, energy?, c) Show that the total mechanical, energy of a freely falling body is, conserved., [ Imp – 2010], 18. Collision between two particles need not, be the physical contact of two particles as in, the case of scattering of the  -particle by a, nucleus, a) What is the quantity that remains, conserved in all types of collisions?, b) Suppose an electron and a proton are, projected with equal kinetic energy,, what will be the ratio of their linear, momentums if the proton is 1830, times heavier than an electron?, c) The bob of a pendulum released from, 300 to the vertical hits on another bob, of equal mass at rest. How high does, the first bob rise after the collision?, (Assume that the collision is elastic, and the sizes of the bobs are, negligible.), [March 2010], 19. Work is related to force and displacement, over which it acts., , a) A man tries to pull a rigid wall for a, long time but fails to displace it. What, is the external work done by him?, b) Suggest two conditions for the work, done by a force to be zero., c) A body of mass 1 kg travels in a, 3, , straight line with a velocity v  kx 2, where k = 5 SI units. Calculate the, work done by the net force to displace, from x =0 to x = 2 m., [March 2010], 20. a) State work-energy theorem., b) Prove work-energy principle for a, particle moving with a constant acceleration, along a straight line., c) A bullet of mass 20g pierces through a, plate of mass 1 kilogram and then comes to, rest inside a second plate of mass 2.98, kilograms as in figure. It is found that the two, plates,, , Initially at rest, now move with equal velocity., Find the percentage loss of the initial velocity, of the bullet when it is between the plates., [ Imp – 2009], 21. Work is required to be done to lift a body, from the ground. Let the body be dropped, from the height ‘h’., a) State the work-energy theorem., b) Draw graphically, the variation of, K.E and P.E. with the height of the, body. Where do you find:, i ) The maximum P.E. ?, ii) The maximum K.E.?, c) State and prove the law of, conservation of energy in this case., [MARCH-2009], , Page17

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+1 Physics Previous (2009-2016) Questions Chapter Wise, you just begin to climb. Explain, why. (1), [March 2016], , Chapter -7, System of particles and, Rotational Motion, 1A. a) Classical dancers bring their hands, closer to their body to rotate faster. Name, the principle employed by them., (1), b) A wheel rolls along a straight line., Derive an expression for its total kinetic, energy., (3), c) The rotational analogue of force is, ...................., (1), , 3A. a) State perpendicular axis theorem. Use, this theorem to find the moment of inertia of a, ring about its diameter., (4), b) Two identical concentric rings each of, mass M and radius R are placed perpendicular, to each other. What is the moment of inertia, about an axis passing through the centre of, mass of this system?, i), , 3, MR 2, 2, , ii) 2MR 2, , iii) 3MR 2, , OR, , iv), , 1B. Moment of inertia about a diameter of, , MR 2, ., a ring is I 0 , 2, a) Name the theorem that helps to find, the moment of inertia about a tangent, parallel to the diameter., (1), b) Draw a diagram and find the moment, of inertia about a tangent, parallel to, the diameter of the ring., (3), c) The rotational analogue of mass is, ................., (1), , 2. The rotational analogue of force is, moment of force, also called torque., a) The turning effect of force is, maximum when the angle between, , , , r and F is............. (1), , b) A wheel starting from rest acquires, an angular velocity of 10 rad/s in, two seconds. The moment of inertia, of the wheel is 0.4 kg m2. Calculate, the torque acting on it., (3), c) The possibility of falling backward, with the ladder is more when you, are high up on the ladder than when, , (1), , OR, 3B. a) Derive the mathematical relation, between angular momentum and torque. State, the law of conservation of angular, momentum. (4), b) A solid sphere is rotating about a, diameter at an angular velocity ω. If it cools, so that the radius reduces to, , 1, of its original, n, , value, its angular velocity becomes…… (1), [Imp 2015], i), , [SEPT-2016], , 1, MR 2, 4, , , n, , ii), , , n2, , iii) n, , iv) n 2, , 4. Moment of inertia is the rotational, analogue of mass in linear dynamics. Write, the equation of the moment of inertia of a disc, about an axis passing through its centre and, perpendicular to its plane., (1), a) State the parallel axis theorem of, moment of inertia., (1), b) A coin is rolling on a plane surface., What fraction of its total kinetic, energy is rotational?, (2), [March 2015], 5. Moments of inertia of a ring about an axis, passing through the centre is MR2. The, , Page18

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+1 Physics Previous (2009-2016) Questions Chapter Wise, moment of inertia about a diameter can be, found using the perpendicular axis theorem., a) State the perpendicular axis theorem., b) Obtain the expression for the moment, of inertia of a ring about its diameter. (1+ 2), , [Imp-2014], , 8. In an experiment with, a bicycle rim, keeping the, ring in the vertical position, with both the strings in, one hand, put the wheel in, fast rotation (see fig)., When string B is released,, the rim keeps rotating in a, vertical plane and the, plane of rotation turns, around the string A., a) Mention the law that explains the above, result., , 6. Moment of inertia is the analogue of mass, in rotational motion. But unlike mass; it is not, a fixed quantity., (1+2+2), , b) Explain the practical example (shown in the, fig) based on the law mentioned in (a), , a) Moment of inertia can be regarded as, a measure of rotational inertia. Why?, b) Write any two factors on which the, moment of inertia of a rigid body, depends., c) The moments of inertia of two rotating, bodies A and B are IA and IB (IA > IB) and, their angular momentum are equal. Which, one has a greater kinetic energy? Explain., [March 2014], 7. A thin circular ring is rotating about an, axis., (1+2+2), a) State the theorem which will help, you to find the moment of inertia, about its diameter., b) Using this theorem, find the, moment of inertia of the ring about, its diameter., c) A rolls down the inclined plane, without slipping. Find the velocity, of the ring when it reaches the, ground., [Imp-2013], , c) How will you distinguish a hard-boiled egg, and a raw egg by spinning each on a table top?, d) A solid cylinder of mass 20kg rotates about, its axis with an angular speed of 100 rad s-1., The radius of the cylinder is 0.25m. What is, the magnitude of angular momentum of the, cylinder about its axis?, [March 2013], 9. A solid sphere of mass ‘m’ and radius ’r’, starts from rest and rolls down along an, inclined plane as shown., , Page19

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+1 Physics Previous (2009-2016) Questions Chapter Wise, a) Write an expression for the moment, of inertia of the sphere about its axis, passing through the centre., b) Why moment of inertia is also called, as rotational inertia?, c) Find the velocity when it reaches the, ground., [Imp-2012], 10. Rotational inertia is the tendency of a, rotating body to resist any change in its state, of rotational motion., a) What you mean by the radius of, gyration of a rolling body?, b) Show that the disc has the moment of, inertia I , , MR 2, about an axis perpendicular, 2, , to the disc at its centre., c), The figure shows two different, spinning poses of a ballet dancer., , 12. a) A body rolls over a horizontal, smooth, surface without slipping with a translational, kinetic energy E. Show that the kinetic energy, , , , of the body is E  1 , , , , K2 ,  , where K is the, R2 , , radius of gyration and R is the radius of the, body. Using the above relation, find the total, kinetic energy of a circular disc., b) A wheel of mass 1000 kg and radius 1 m, is rotating at the rate of 420 r.p.m. What is the, constant torque required to stop the wheel in, 14 rotations, assuming the mass to be, concentrated at the rim of the wheel?, [March – 2011], 13. The moment of inertia of a uniform thin, circular disc about a diametric axis of the disc, is, , MR 2, where M is the mass and R is the, 4, , radius of the disc., , In which spinning pose does the ballet, dancer have less angular velocity? Justify, your answer., [March 2012], 11. Moment of inertia plays the same roll in, rotational motion as mass in linear motion., The moment of inertia of a body changes, when the axis of rotation changes., a) State the parallel axes theorem on, moment of inertia., b) Write the relation between moment of, inertia and angular momentum., c) If the moment of inertia of a disc, about an axis passing through its, centre and perpendicular to its plane, is, , MR 2, (M is the mass of the disc, 2, , and R is radius). Determine its, moment of inertia about a diameter, and about a tangent. [Imp-2011], , a) There is a theorem which helps to find, the moment of inertia of the disc, about another axis parallel to this, axis. Give the statement of this, theorem., b) Using the theorem find the moment of, inertia of the disc about a tangential, axis in the plane of the disc., c) A circular disc of mass 0.15kg and, radius0.1 m makes 120 revolutions in, one minute about its own axis., Calculate its angular momentum., [ Imp – 2010], 14A. In a hammer throw event, a solid sphere, of mass 16 kg is tied to a light 50 cm long, chain. A sportsman gives to it a constant, moment of 30 N-m for 10 seconds and then, throws the sphere. Consider the sphere as a, point mass., a) Find the moment of inertia about the, axis of rotation., b) If ‘L’ is the angular momentum and ‘, , T ’ is the torque, show that T , , dL, ., dt, , Page20

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+1 Physics Previous (2009-2016) Questions Chapter Wise, c) Write an example for the motion in, which an angular momentum remains, constant., OR, 14B. Remya stands at the centre of a turntable with her two arms outstretched. The, table with an angular speed of 40 revolutions, / minute., a) What will happen to the moment of, inertia if she folds her hands back?, b) If the angular speed is increased to, 100 revolutions / minute, what will be, the new moment of inertia?, c) Write the expression for the, rotational kinetic energy of the, system and explain the terms, involved in it., [March 2010], 15A. a) Moment of inertia of a particle is a, measure of its rotational inertia. The moment, of inertia of a system will be the sum of the, moment of inertia of the components, translated to the particular axis mentioned., Find the moment of inertia of a thin meter, scale about a perpendicular axis through the, centre. Take M as the mass of the scale., b) Find the moment of inertia of a thin, circular disc of mass m and radius R about one, of its diameters., c) If a, student, fixes, two such discs, at the ends of, the meter scale, and rotates the system about an axis, perpendicular to the length of the scale as in, figure. What will be the Moment of inertia of, the system?, OR, 15B. a) Explain the term radius of gyration of, a body., b) If the acceleration of a rolling body, through an inclined plane is given by a =, ,  g sin  , ,find the acceleration of a, , 2, 2 ,  1 K / R , sphere of mass M and radius R.K is the radius, gyration., c) Using the above equation find the, acceleration of a disc of radius R and mass M., If a student allows the sphere and disc to roll, down simultaneously, which will reach down, first? Give the reason., [ Imp – 2009], 16. A solid sphere, a ring and a circular disc, of identical radii are rolling down an inclined, plane without slipping from the same height,, starting from rest., a) i) Which will reach the bottom first?, b) ii) The moment of inertia of a disc, about an axis passing through its, centre and perpendicular to its plane, is, , MR 2, . Find its moment of inertia, 2, , about an axis passing through its edge, and parallel to its diameter., c) A ring of radius 2 m weighs 100 kg., It rolls along a horizontal floor so that, its centre of mass has a speed of 20, cms-1. What is its total kinetic energy?, [MARCH-2009], , Chapter -8, Gravitation, 1. a) State Kepler’s second law of planetary, motion. (Law of areas)., b) Derive an equation for the orbital, velocity of a satellite., (2), c) Escape the velocity of a planet is 20, Km/s. Find the orbital velocity of the, smallest possible orbit., (2), [SEPT-2016], 2A. The acceleration due to gravity may, vary with altitude and depth., , Page21

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+1 Physics Previous (2009-2016) Questions Chapter Wise, a) Arrive at an expression for, acceleration due to gravity at a, height h. (h<< RE), (2), b) Why does satellite need no fuel to, go around a planet in its fixed orbit?, c) Acceleration due to gravity is, independent of ................ (mass of, earth / mass of body) (2 +1), [March 2016], OR, 2B. For a particle to overcome the, gravitational pull of earth, it is projected with, a minimum velocity., a) Name the minimum velocity. (1), b) Obtain an expression for the above, minimum velocity., (2), c) A ball bounces more on the surface, of the moon than on the earth., Explain why. (2) [March 2016], 3. For a body to leave from earth’s, gravitational field, it should be projected with, a minimum velocity., [Imp 2015], , 5. Match the following, , ( 6 x ½ = 3), , a) Kepler’s laws, i) Scalar, b), Gravitational ii) Planetary motion, constant, c) Velocity, iii) Inertia, d) Newton’s first iv) 9.8 ms-2, law of motion, e) Acceleration due v) [LT-1], to gravity, f) Distance, , vi), 6.67, Nm2kg-2, ,  10-11, , [Imp-2014], 6. The velocity of a satellite in its orbit is, called orbital velocity., a) Find the relation between orbital, velocity and escape velocity., b) What is a geostationary satellite?, c) Moon has no atmosphere. Why?, (2+ 1+ 1), , [Imp-2014], , 7. Choose the correct alternative. (1+1), , a) i) Name the velocity, (1), ii) Derive an expression for this, velocity, (2), b) The moon does not have an, atmosphere around it. Give reason., (2), , a) Escape velocity is independent of the, mass of the earth / the mass of the, body., b) Gravitational force / weak nuclear, force is the weakest fundamental, force., [March 2014], , 4. Out earth has several artificial satellites., But the moon is the only natural satellite., , 8A. Earth satellites are objects which revolve, around the earth. Consider a satellite at a, height ‘h’ from the surface of the earth, , a) If acceleration due to gravity at the, surface of earth is ‘g’, arrive at the, expression for acceleration due to, gravity at a depth ‘d’., (2), b) Distance to the moon from the earth, is 3.84 x 108 m and the time period of, the moon’s revolution is 27.3 days., Obtain the mass of the earth., (Gravitational constant, g=6.67 x 10-11 Nm2kg-2.), (2), c) How do you explain weightlessness, in an artificial satellite?, (1), [March 2015], , a) Give an equation for its orbital, velocity. (1), b) Obtain an equation for the period of, the above satellite., (2), c) Distinguish between geo stationary, satellites and polar satellites. (1), OR, 8B. The value of acceleration due to gravity is, maximum on the surface of the earth., a) Write, the, relation, between, acceleration due to gravity and, gravitational constant., b) Obtain an equation for the variation of, ‘g’ with height, , Page22

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+1 Physics Previous (2009-2016) Questions Chapter Wise, c) Draw a graph showing the variation, of ‘g’ with depth and height from the, surface of the earth. Assume that the, density of earth is constant., (1+ 2+ 1), [March 2014], 9A. For a particle to leave from the earth’s, field, it should be projected with a minimum, velocity., (1+2+2+1), , 10B. The acceleration due to gravity (g) on the, surface of the earth is 9.8m/s2., a) Define the acceleration due to gravity (g)., b) Derive an expression for the variation of g, at a depth ‘d’ below the surface of earth., c) At what height ‘h’ will the value of ‘g’ be, half of that on the surface of the earth?, , a) Name the velocity., b) Obtain, above velocity., , the, , [March 2013], , expression, , for, , the, , c) An elephant and an ant are to be, projected from earth into space. Whether the, velocities required for doing so are the same, or different? Justify your answer., d) Find the period of a simple pendulum, if, this experiment is performed inside a satellite?, , 11. Match the following:, Fundamental force, Newton’s first law, Strong force, Kepler’s law, Circular motion, Newton’s third law, , Planetary motion, Centripetal force, Recoil of the gun, Nuclear force, Inertia, Gravitational force, [Imp-2012], , 12. Nowadays we are familiar with satellites., OR, 9B. The acceleration due to gravity (g) on the, surface of the earth is 9.8m/s2, a) Define acceleration due to gravity (g)., b) Derive an expression for the variation, of (g) with height (h) above the surface of the, earth., c) At what height ’h’ the value of ‘g’ will, be half of that on the surface of the earth?, (1+3+2) [Imp-2013], , a) Name any two satellites., b) Differentiate escape velocity from, orbital velocity., c) For an earth satellite show that,, , 2  Orbital, Escape Velocity =, Velocity., [Imp-2012], 13. a) The value of acceleration due to gravity, is maximum at the................., i., , Poles, , ii. Equator, , iii. Center of the earth, , 10A. The escape speed for an object from the, earth is 11.2km/s., , b) Find the height at which ‘g’ is reduced, to g/2., , a) What is mean by escape speed?, , c) A rat and a horse are to be projected, from earth into space. State whether the, velocity is the same or different in projecting, each animal. Justify., [March 2012], , b) Arrive at an expression for the escape speed, from the earth., c) Explain whether the escape speed depends, on the mass of the object or not., d) The earth contains an atmosphere while the, moon does not. Give the reason., [March 2013], , 14. Imagine a point mass ‘m’ maintained at, the centre of a shell of uniform density having, mass ‘M’. If the radius of the shell is R, what, will be the gravitational force exerted by the, shell on the point mass? Explain., [Imp-2011], , Page23

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+1 Physics Previous (2009-2016) Questions Chapter Wise, 15. The acceleration of a body due to the force, exerted by earth on it is known as acceleration, due to gravity., (1+ 2), a) Why does earth impart same, acceleration on all bodies?, b) Show graphically the variation of, strength with distance from the centre, of the earth outwards. [Imp-2011], 16. A person in an artificial satellite of the, earth experiences weightlessness The moon is, a natural satellite of the earth., a) Can a person on the moon experience, weight? Why?, b) A satellite is revolving very close to, earth. What is the percentage increase, in velocity needed to make it escape, from the gravitational field of the, earth?, c) Acceleration due to gravity ‘g’, depends on the distance ‘r’ from the, center of the earth. Draw a graph, showing the variation of ‘g’ with ‘r’., [March – 2011], 17. The earth revolves around the sun in an, elliptical orbit. The closet approach of the, earth with the sun is called perihelion. When, the approaches the perihelion, its speed, increases. Explain this principle., [March – 2011], 18. weight of a body is the force of, gravitational attraction experienced by it. It is, equal to the product of mass of the body and, acceleration due to gravity., a) Obtain an expression for the, acceleration due to gravity of a body, in terms of the mass of the earth., b) If you imagine the motion of a body, from the centre of the earth to the, surface of the moon, what change will, you observe in the weight of the body, during that motion? (Neglect the, effect of all other objects)., [ Imp – 2010], , 19. There are different types of forces in, nature. We learnt their effects and, applications. Give the exact reasons for the, following., a) Why does a satellite revolve around, the earth in a circular path?, b) Why is it easy to lift a heavy stone in, water?, [March 2010], 20A. a) The minimum velocity with which, a body is to be projected so that it never, returns to earth is called the escape velocity., Arrive at an expression for escape velocity of, earth., b) Explain whether escape velocity, depends on mass of the body or not., c) Show how escape velocity and orbital, velocity are related., OR, 20B a) What will happen to acceleration, due to gravity, i. If the earth stops rotating, ii. If the rotational speed is increased?, b) Keeping the mass of earth the same if, the diameter is shrinked by 1%, what will, be the percentage change in acceleration, due to gravity on the surface., c), If the radius of earth suddenly, reduces to half its value, what will be its, effect on the duration of the day?, [ Imp – 2009], 21. When we throw a stone into the air, it, comes back to the earth. But when we increase, the speed of the stone, it may escape from the, gravitational attraction of the earth., a) Explain the term escape velocity., What is its value on the surface of the, earth?, b) The radius of the earth is reduced by, 4 % of its initial value. The mass of, the earth remains unchanged. What, will be the percentage of change in, the escape velocity?, Page24

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+1 Physics Previous (2009-2016) Questions Chapter Wise, c) Assuming that planets move in, circular orbits, derive Kepler’s third, law on planetary motion., [March-2009], , 4. A rubber band can be pulled to several, items its original length., a) Draw the stress-strain graph of a, rubber band., (1), b), Rop e of cranes is made of a, number of thin wires braided together., Why?, (1), [March 2015], , Chapter -9, Mechanical Properties of Solids, 1. a) The ratio of shear stress to shear strain, is ..............., , 5. A rigid is a body with a perfectly, unchanging shape under the influence of an, external force., a) What you mean by the centre of mass, of a rigid body?, (1), , (i) Poisson’s ratio, (ii) Young’s modulus, (iii) Bulk modulus, (iv) Rigidity modulus, , (1), , b) State Hooke’s law., , (1), , [SEPT-2016], 2. The stress-strain graph for wires of two, materials A and B are given below., , b) A rigid beam of length L, breadth b, and depth d is supported near its ends, as shown in the figure. A load W is, suspended at its centre of mass. Write, the expression for the amount of, sagging., (1), [March 2015], 6. When a force is applied to a spring, it gets, extended by an amount x as shown., , a) Which material is more ductile? (1), b) When a spring balances are, continuously used for long time,, they show wrong reading. Explain, why. (2), [March 2016], 3. Young’s moduli of three materials are, given in the below table., [Imp 2015], a), , What do you mean by Young’s, modulus? Write a mathematical, expression for it., (2), b) Select the material from the table,, which shows more elasticity. (1), , Substance, X, Y, Z, , Young’s Modulus(N/m2), 70 x 109, 120 x 109, 200 x 109, , (a) Name the law relating stress and strain., (b) Calculate the stress developed in a metal, wire when it is strained by 30%. Given, young’s modulus of material is 200 GPa., (c) Which is more elastic, steel or rubber?, Why? (1+2+2), [Imp-2014], , Page25

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+1 Physics Previous (2009-2016) Questions Chapter Wise, 7. The graph below shows how the force, applied to a metal wire is related to the extent, ion of the wire., , b) Discuss the behaviour of wire at, various stages., c) State Hooke’s law. For which part of, the above graph is this applicable., d) Which is more elastic; steel or, rubber? Why?, [Imp-2012], 11. When a mass is suspended on a metallic, wire, the length of the wire increases, slightly., , a) Write the letter that corresponds to:, i) Elastic limit, ii) Fracture point, , (2 x ½ =1), , b) The wire has an unstretched length of, 2.40 m and an area of cross section of, 3.90  10 – 7 m2. Determine the, Young’s modulus Y of the material., (2), [March 2014], 8. Stress – Strain graph of two materials is, show below:, , a) State the law which relates stress with, strain., b) Which materials is more ductile (A or B)?, c) Which material is preferred for making, springs (A or B)? Why? (1+1+1) [Imp-2013], 9. Hooke’s law states that stress  strain., , a) Name and the state law that relates to the, restring force developed in the wire and its, deformation., b) Draw the stress – strain graph of a, loading wire., Mark the following points:, i. Elastic limit, , ii., , Fracture point, , iii. Plastic region, , iv., , Elastic region, , c) If the young’s moduli of iron and glass, are 190  109 Nm-2 and 65  109 Nm-2, respectively. Which is more elastic? Justify, your answer., [March 2012], 12. Elasticity is the property of a body by, which it regains its original state on the, removal of the deforming force., (1+ 2), a) Why Steel is more elastic than, Rubber?, b) The figure given below shows the, stress-strain curve for a given, material. What are the Young’s, modulus and approximate yield, strength for this material?, , a) What is the necessary condition for the, above law to be valid?, b) Explain with the help of a graph, the, relation between stress and strain for a given, solid material under increasing tensile stress., [March-2013], 10. When a wire is stretched with a very large, force it breaks., , [Imp-2011], , a) Represent the variation of extension, with load on a graph, Page26

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+1 Physics Previous (2009-2016) Questions Chapter Wise, 13. When the pressure on a sphere is increased, by 80 atmospheres, its volume decreases by, 0.01%. Find the bulk modulus of elasticity of, the material of the sphere., (2), [Imp-2011], 14. Elasticity is an internal property of matter., Fluids possess volume elasticity. Which is, more elastic, air or water? Why?, [March – 2011], 15. Modulus of elasticity of a material is the, ratio of stress and strain., a) Young’s modulus for a perfectly rigid, body is --------b) One end of a rope of a length 4.5 m, and diameter 6 mm is fixed to the, branch of a tree. A monkey weighing, 100 N jumps to catch the free end and, stays there. Find the elongation of the, rope. (Young’s modulus = 4.8  1011, N/ m2)., [ Imp – 2010], , 16. Elasticity is the property of matter that is, characterized by atomic packing. For an, elastic solid, stress applied is directly, proportional to the strain produced in it. The, stress versus strain graph for three materials, A, B and C is shown below., , a), Which, is, more elastic A, B or, C? Justify your, answer., b), If the bulk, modulus of water is 2 x 109 Nm-2, find, its compressibility., c) Why are girders for supporting roofs, formed in the shape of I?, [March 2010], , Chapter -10, Fluids, 1A. Consider the flow of a liquid through a, pipe of varying cross section., a) Write the equation of continuity of, flow. (1), b) Draw a figure and drive Bernoulli’s, equation. (4), c) A tank of 5 m height is filled with, water. Calculate the velocity of efflux, through a hole, 3 m below the surface of, water., (2), OR, 1B. Surface tension is a property of liquids, and it causes capillary rise in small tubes., a) What do you mean by surface, tension?, (1), b) Draw a figure and derive an equation, for capillary rise in a tube of radius, ‘r’., (4), c) Excess pressure inside a liquid drop, is 60 N/m2. What will be the excess, pressure inside a liquid bubble of the, same radius formed by the same, liquid?, (2), , [SEPT-2016], , 2A. In case of fluids law of conservation of, energy can be explained with Bernoulli’s, principle. [March 2016], a) State and prove Bernoulli’s, principle., (4), b) While travelling in aeroplane, it is, advisable to remove ink from, fountain pen. why?, (2), OR, 2B. Viscosity is the frictional force in, fluids., a) When a small metal ball is falling, through a viscus medium, what are, the various forces acting on it? Using, , Page27

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+1 Physics Previous (2009-2016) Questions Chapter Wise, and explain the principles of working, of a hydraulic lift. (3), c) The above arrangement is placed in, an elevator which is accelerating, upwards. What happens to the, possible height of the liquid column, in the tube? Justify., (2), , this arrive at an expression for, terminal velocity., (4), b) Raindrops falling under gravity do not, acquire very high velocity. Why? (2), [March 2016], 3A. a) State and prove Bernoulli’s theorem., (4), , [Imp 2015], , OR, 4B. The antiseptic used for cuts and wounds, in human flesh have low surface tension. Due, to low surface tension, they spread over the, wounds easily., a) In the following figure, the angle of, contact  is........., (1), , b) Surface tension causes capillarity., Define capillarity and arrive at the, expression for capillary rise in terms, of surface tension., (3), c) In a capillary tube, water rises to a, height. If the capillary tube is inclined, at an angle 600 with the vertical, what, will be the length of the water column, in the tube. (2) [March 2015], , b) A steady flow of nonviscous liquids are, shown in ffigures 1 and 2. Which one of the, figures is INCORRECT? Why?, (2), OR, 3B. a) What is the SI unit of pressure? Derive, a mathematical expression for excess pressure, inside a liquid drop., (4), b) What will happen to two soap bubbles, of radii, which are in contact with each other?, Why? (2), , 5A. Law of conservation of energy is a, universal law for all states of matter. (1+ 3), a) Which theorem gives the law of, conservation of energy for a flowing, liquid?, b) State and prove the above theorem., , 4A. The pressure of the atmosphere at any, point is the weight of the air column of a unit, cross sectional area., Its unit is bar., a) Identify the, given diagram, and write its, use., (1), , OR, 5B. A liquid surface behaves like a stretched, elastic membrane., a), b), , Name the liquid property for the, above behaviour., Define angle of contact. What is its, value for pure water with glass?, , b) State Pascal’s, law for transmission of fluid pressure, , Page28

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+1 Physics Previous (2009-2016) Questions Chapter Wise, c), Derive an expression for the rise of, liquid in a capillary tube of radius r, having, density  and surface tension S., [Imp-2014], 6. Fill in the blanks. (1), Venturimeter: Bernoulli’s theorem, Hydraulic lift: .................... [March 2014], , iii., , No change occurs in their, sizes, Their sizes become equal, [March 2014], , iv., , 7A. The viscous force exists when there is a, relative motion between the layers of the fluid., (1+ 3+ 1), a) State true or false: “The viscosity of, gases decreases with an increase in, temperature.”, b) Obtain the expression for the terminal, velocity attained by an object falling, through a viscous medium., c) The speed – time graph of a falling, sky diver is shown below. During the, fall he opens his parachute., Which part of the graph shows the sky diver, falling with terminal velocity?, OR, 7B. There is always an excess of pressure, inside drops and bubbles., (1+ 3+ 1), a) State true or false: “A drop of liquid, under no external forces is always, spherical in shape.”, b) Obtain an expression for excess of, pressure inside a drop of radius r and, surface tension S., c) Two soap bubbles A and B are blown, at the ends of a tube, as shown below., , Choose the correct answer:, When the block C is removed..., i., The size of A increases and, that of B decreases, ii., The size of B increases and, that of A decreases, , 8. Pick the odd one out from the following, a) Atomiser, , b) Hydraulic Lift, , c) Venturimeter, , d) Aerofoil, , (1), , [Imp-2013], 9A. (a) When air is blown in between the, two balls, will they, attract, or, repel?, (1), (b) State the principle, that, explains, your, observation., , (1), , (c) Using this principle, derive Torricelli’s, equation [Speed of Efflux], (3), 9B. When a thin tube is, dipped in water, water, rises in the tube through a, height ‘h’, a) Name, the, phenomenon., b) Arrive at an expression for the, height of the water rise (h) in the, tube., c) Will water overflow, if the tube is, cut at level A? Justify your answer., (1+3+1), , [Imp-2013], , 10. A small water drop placed on a lotus leaf, is spherical in shape., a) Define surface tension., , Page29

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+1 Physics Previous (2009-2016) Questions Chapter Wise, b) Why does the small water drop acquire a, spherical shape?, [March-2013], 11. A. Three vessels of different shapes are, filled with water to the same height ‘h’ and, their bottom parts are connected to, manometers measuring the pressure. The, water levels in all the vessels remaining the, same., , b) What is the value of the angle of, contact for pure water?, c) Calculate the work done in breaking a, water drop of radius 1mm to 1000, droplets., Surface, tension, of, -3N/m., water = 72 x 10, [Imp-2012], OR, 13B. a) Is pressure in a liquid, scalar or vector., b) State the law associated with liquid, pressure., c) Briefly explain the working of, hydraulic lift., [Imp-2012], 14. Match the following:, , a) Identity the above phenomenon., b) Predict the pressure level shown, the manometers., , by, , c) Blood pressure in humans is greater at, the feet than at the brain. Explain why., d) Pick the odd one out., Dentist chair, hydraulic brake, hydraulic, press, venture meter., [March 2013], 12. The flow of an ideal fluid in a pipe of, varying cross section is shown., , a) Differentiate between streamline flow and, turbulent flow., b) State and prove Bernoulli’s principle., [March 2013], 13A. Surface, temperature., , tension, , changes, , with, , a) Hot soup is tastier than cold one., Why?, , [March 2012], , A, a) Reynold’s, number, b) Magnus effect, , B, Equation, of, continuity, Surface tension, , c) Action of, detergent, d) a 1 v 1  a 2 v 2, , Archimedes, principle, Viscosity, Bernoulli’s, principle, Pressure, , 15. Raindrops falling due to gravity do not, acquire high velocity., a) Define the velocity of the raindrop, when unbalanced force on it is zero., b) Why do bubbles of air rise up through, water?, c) The terminal velocity of copper ball, of radius 2.0 mm falling through a, tank of oil at 200 C is 6.5cm s-1., Compute the viscosity of the oil at, 200C. Density of oil is 1.5  103kgm-3, density of copper is, 8.9 , 103kg m-3., d) Viscosity, of, gases........with, temperature, whereas viscosity of, liquids, .........with, temperature, (increases/decreases). [March 2012], 16A. The rise or fall of a liquid against, gravitational force through fine tubes is, known as capillarity., , Page30

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+1 Physics Previous (2009-2016) Questions Chapter Wise, a) Give an example for capillarity from, practical life., (1), b) Derive an expression for the capillary, rise through a capillary tube., (2), OR, , c) Derive an expression for the capillary, height of a liquid in a narrow tube., OR, , 16B. When we below between two light balls, suspended nearby they approach each other., Why?, a) State the principle that can explain, your observation., (1), b) Use this principle to arrive at, Torricelli’s equation. (Velocity of, Efflux), (2), [Imp-2011], 17. A solid sphere falling through a viscous, medium attains a constant velocity called, terminal velocity after some time of its, fall. What are the different forces acting, on the sphere? Derive an expression for, terminal velocity in terms of the, coefficient of viscosity of the medium., [March – 2011], 18. a) Hydraulic lift is a device used to lift, heavy loads. State the principle behind the, working of this device., b) The velocity of outflow of a liquid from, an open tank is identical to that of a freely, falling body., i., ii., , Name this law and the principle, behind this law., Derive this law based on this, principle., [March – 2011], , 19A. Water does not wet the feathers of ducks., A physical quantity called angle of contact, determines whether a liquid will spread on the, surface of a solid or it will form droplets on it., a) Define angle of contact., b) A wire ring of internal radius 3 cm is, rested on the surface of a liquid and is, then raised. An extra pulling force, equivalent to the weight of 3.03 g is, required before the film breaks than it, is after. Calculate the surface tension, of the liquid., , 19B. If air is blown through the space, between two discs BC and DE shown in the, figure, the lower disc DE instead of being, blown off from BC, will move towards BC., a) State the principle which is used to, explain this phenomenon., b) A garden hose having an internal, diameter of 2 cm is connected to a, lawn sprinkler that consists of an, enclosure with 12 holes, each 0.2 cm, in diameter. If the water in the hose, has a speed does it leave the sprinkler, holes?, c) Show that the speed of liquid flowing, out of a small hole in a tank filled with, liquid will be, , 2gh where h is the, , height of liquid above the hole and g, is the acceleration due to gravity., [ Imp – 2010], 20. Match the following, Equation of, continuity., Pascal’s law, , Hydraulic lift., F  ma, Rocket, AU, 1 1  A2U 2, propulsion., , Newton’s, law, of, motion, Boyle’s law, , PV, 1 1  PV, 2 2, F1 F2, , A1 A2, , Quill tube, Venturimeter., [March 2010], , 21. Washing with water doesn’t remove, grease stains from clothes but addition of, detergent removes the molecules of greasy, substances., a) Which property of a liquid causes the, above effect?, , Page31

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+1 Physics Previous (2009-2016) Questions Chapter Wise, b) A single drop of liquid is split into 8, identical drops. What will be the, excess pressure in each drop?, c) How can the coefficient of viscosity, of a highly viscous liquid the, determined by Stokes method?, [March 2010], 22. a) Explain the terms surface tension and, surface energy., b), Show that surface tension is, numerically equal to surface energy., c) Calculate the amount of energy, evolved when eight drops of mercury of, radius 1mm each, combine to form one, drop, (surface tension of mercury is 0.55, N/m)., [ Imp – 2009], , drops were to combine to from one, large spherical drop?, [March-2009], , Chapter -11, Thermal Properties of Matter, 1. a) Triple point of water is 0.010C., Express this temperature in Kelvin scale. (1), b) How does sea breeze occur? Explain., (2), [SEPT-2016], 2. A hole is drilled in a copper sheet. The, diameter of the hole is 4.24 cm at 270C., What is the change in diameter of the hole, when the is heated to 2270 C?, (2), , 23. Mercury barometer is a device used to, measure the atmospheric pressure., , (Coefficient of linear expansion of copper =, 1.7  10-5/0C)., [March 2016], , a) If a student places the barometer in a lift,, falling freely under gravity, how the, barometer reading will change., b) If the same barometer is placed in a lift, that is ascending with an acceleration f,, how the barometer reading will change., c) Find an expression for pressure P, at a depth h below the surface of, a liquid of density ρ in a container, moving vertically upwards with, an acceleration f ? What happens, to pressure for a free fall of the, container?, [ Imp – 2009], , 3. The below graph represents temperature, versus heat for water at 1 atm. pressure. [Imp, 2015], , 24. Rain drops are being accelerated while, falling through the atmosphere. But they reach, at the surface of the earth with a uniform, velocity., a) What is this velocity called?, b) Obtain an expression for the excess, pressure inside a rain drop., c) Draw a neat diagram of an atomiser, (spray gun) and explain the principle, involved in its working., d) Eight spherical rain drops of equal in, size are falling vertically through air, with a uniform speed of 1 ms-1. What, would be the uniform speed if these, , (a) Match the following using the above, graph., (2), Graph Process, i) BC a) Melting, ii) DE b) Sublimation, c) Regelation, , State, p) Water, q) Ice, r)Partially Solid, and liquid, d) Vapourisation s) Partially liquid, and vapour, b) The slopes of AB and CD are different., Why?, (1), 4. A steel beam of length 5m is kept at a, temperature of 200C. On a hot day, the, temperature rises to 400C. What is the change, in its length due to thermal expansion? (2), (Coefficient to linear expansion of steel is, 1.2 x 10-5/0C)., , [March 2015], Page32

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+1 Physics Previous (2009-2016) Questions Chapter Wise, 5. Complete the table., , (4 x ½ =2), , Temperature, , Kelvin, scale, , Celsius, scale, , Fahrenheit scale, , Steam point, , 373.15, K, , ........, , 212.000F, , Ice point, , .........., , 0.000C, , ........., 459.690F, , Absolute zero 0.00K, , ........, , 6. The coefficient of thermal expansion in, solids are mainly i) Coefficient of Linear, Expansion (  ) ii) Coefficient of Area, Expansion (  ) iii) Coefficient of Volume, Expansion (  )., a) What is the ratio of  ,  and  ?, , (1), , b) Invar is used for making pendulum of, clocks. Why?, (1), [Imp-2013], 7. There are three distinct modes of heat, transfer., a) The main mode of transmission of heat, by which the sun heats the surface of the earth, is:, i) Conduction, iii) Radiation, , ii) Convection, iv) None of these, , b) Explain briefly, the occurrence of a sea, breeze based on heat transfer. [March-2013], 8. Heat from the sun reaches earth through, vacuum., , a) Temperature of a normal human body, is 98.60F. What is the corresponding, temperature shown in the Celsius, scale?, b) Specific heat capacity of water is, 4186J/kg/K. What do you understand, by the term, specific heat?, c) A brass tumbler feels much colder, than a wooden tray on a chilly day., Why?, d) A brass boiler has a base area of, 0.15m2 and thickness 1.0 cm. It boils, water at the rate of 6.0 kg/minute, when placed on a gas stove. Estimate, the temperature of the part of the, flame in contact with the boiler., Thermal conductivity of brass = 109, Js-1m-1K-1. Heat of vaporization of, water = 2256  103J kg-1., [March 2012], 10. Sitha prepared tea for her brother. After, preparing tea the temperature of the tea was, 800 C. She kept it for 5 minutes and gave to, her brother when the temperature reached 500, C. If the surrounding temperature is 200 C., Calculate the time it takes to cool from 600 C, to 300 C., (2), 11. Water kept in earthern pots gets cooled., Why?, [March – 2011], 12. The increase in dimensions of a body due, to increase in temperature is called thermal, expansion., , c) Aquatic animals are protected in cold, countries as ice is formed on the, surface of river. How? [Imp-2012], , a) The ratio among the coefficients of, linear expansion, area expansion and, volume expansion is ------c) Railway lines are laid with gaps to, allow for expansion. If the gap, between steel rails 66m long is 3.63, cm 100 C, then at what temperature, will the lines just touch? Coefficient, of linear expansion for steel is 11 , [ Imp – 2010], 10-6/0C., , 9. Temperature is the degree of ‘hotness ‘of, the body., , 13. a) Which among the following, possess the highest specific heat capacity?, , a) Name the mode of heat transfer in the, above case., b) Name the different modes of heat, transfer in metals and in liquids?, , i. Water, , ii. Silver, , Page33

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+1 Physics Previous (2009-2016) Questions Chapter Wise, iii. Copper, , iv. Steel, , b) You are in restaurant waiting for, your friend and ordered coffee. It has, arrived. Do you add sugar in your, friend’s coffee and then wait for him, or do you add sugar after the arrives?, Explain with respect to the concept, of cooling., c) Read the statement given in a book, “All thermal conductors also.” Do, you agree with this statement? If, your answer is No, clarify it., [March 2010], 14. a) At atmospheric pressure melting of ice, is 00 C. If the melting point of ice increases by, 0.00730C for fall in every one atmosphere, pressure, what will be the melting point of ice, in vacuum. Also mention briefly why water, under ice in polar region of earth is not, freezing., b) When you are about to make tea from, hot tea and cold milk, your phone is ringing., Which of the following can be done to keep, the cup of tea hotter when you return after, attending the phone call?, , kg -1.K-1, specific latent heat of fusion of ice is, 336  103 J kg-1. Latent heat of steam is 2250,  103 J kg-1 specific heat capacity of water is, 4200 J kg -1 K-1., [ Imp – 2009], , Chapter -12, Thermodynamics, 1. a) What is the difference between, isothermal and adiabatic processes?, b) Explain Carnot’s cycle., , (1), (2), , c) Write the expression for the efficiency, of a Carnot engine., (1) [SEPT-2016], 2. a) Heat engine is a device used to, convert........ energy into .......energy. (1), b) Name the four processes taking place, in Carnot cycle. Draw indicator diagram of, Carnot cycle. (4), [March 2016], 3. P-V diagram of a gas is shown in the, figure. In this figure AB represents isobaric, process and AD represents isothermal, process., [Imp 2015], , 1) Pour hot tea and cold milk in your, cup and leave it to attend phone, call., 2) Mix the two after attending the, call., Also indicate which among the curves, below represents a cooling curve., , a) Explain isobaric process and isothermal, process., (2), b) Using the above graph, find the process in, which the work done is maximum. Give the, reason., (2), , c) Explain the difference between heat and, temperature. Find out the work done to, convert 10 gram of ice at -50C to steam at, 1000C. Specific heat capacity of ice is 2100 J, , 4. Mention two conditions under which real, gases obey the ideal gas equation., (2), [Imp 2015], , Page34

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+1 Physics Previous (2009-2016) Questions Chapter Wise, 5. The variables which determine the, thermodynamic behaviour of a system are, called thermodynamic variables., a) Pick out the one which is NOT a, thermodynamic variable., (1), (temperature,, pressure,, work,, volume), b) What happens to the internal energy, of a gas during, i) isothermal expansion?, ii) adiabatic expansion?, , (2), , c) Gases have two specific heat, capacities, Cp and Cv .Why? (1), d) Laplace pointed out that when sound, is propagating through a gaseous, medium, the change is adiabatic., Show that adiabatic bulk modulus is, (2) [March 2015], P., 6. A thermodynamic process characterized, by pressure, volume and temperature., , (b) During which of the four processes, is, work done by the gas?, (c) How can you find the total work done, during a cycle from the graph?, (d) Calculate the efficiency of the cycle., (1+ 1+ 1+ 1), , [March 2014], , 8. A refrigerator takes a quantity of heat ‘Q’, from the cold body, with work done ‘W’ on it,, transfers heat to the hot body. (1+2+1), a) What does the ratio Q/W represent?, b) The value of Q/W cannot be infinity., State the law of thermodynamics that explains, this statement., c) It is possible to cool a room by leaving, the door of the electric refrigerator open., Comment on this statement. [Imp-2013], 9. Figure given below depicts the schematic, representation of an engine., , a) What is meant by an isothermal, process? Give the equation., b) Name the four processes in a Carnot’s, cycle., c) Draw the P - V diagram for a Carnot’s, cycle., (1+1+1) [Imp-2014], , a) Which type of engine is this, a heat, engine or a refrigerator?, , 7. The figure shows the pressure – volume, relationship of an ideal gas that undergoes a, Carnot cycle. The process B to C takes place, at a constant temperature of 1000K and the, process from D to A at a constant temperature, of 500K., , b) Write the four steps of operation in the, Carnot cycle., c) A Carnot engine is working between, temperatures of 270C and 3270C . Find it, [March-2013], efficiency (  )., 10. Three moles of an ideal gas kept at a, constant temperature of 300 K are compressed, from the volume of 10 litre to 5 litre., a) Which thermodynamic process is, involved in this process?, b) Calculate the work done required to, compress this gas., , (a) Name the process occurring between, i) A and B, , ii) B and C, , c) At, , constant, , temperature,, , P, , 1, V, , .Explain it briefly on the basis of, Kinetic theory of Gases., , Page35

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+1 Physics Previous (2009-2016) Questions Chapter Wise, supplied to the engine from the source, per cycle?, [ Imp – 2010], , [Imp-2012], 11. A heat engine is a device which converts, heat energy into work., a) What is the working substance in an, ideal heat engine?, b) Draw the Carnot cycle and explain its, working., c) Calculate the efficiency of an engine, working between steam point and ice, point. Can you design an engine of, 100 % efficiency?, , 15A. Thermodynamics deals with the concept, of heat and the exchange of heat energy., a) Which law of thermodynamics is, used to explain the working of heat, engine?, b) What are the sink, source and, working substances of a domestic, refrigerator?, c) Explain briefly, the operations of a, Carnot’s engine draw the Carnot’s, cycle and deduce the expression for, its efficiency., , 12. A heat engine is a device that converts, heat energy into mechanical energy., a) Briefly explain the working of a heat, engine taking Carnot engine as an, ideal engine., (3), b) A refrigerator is a reverse heat engine., Can we decrease the temperature of a, room by keeping the door of a, refrigerator opened? Explain. (2), [Imp-2011], 13. a) Isothermal, Isobaric, isochoric and, adiabatic processes are some special, thermodynamic processes. In which of these, processes, the work done is maximum, when, a gas expands from V1 to V2?, b) Which law of thermodynamics implies, that no heat engine can be 100% efficient?, c) One mole of an ideal gas expands from, volume V1 to volume V2 at a constant, temperature T. Derive an expression for the, work done., [March – 2011], 14. A heat engine is a device which converts, heat energy into mechanical energy. Carnot, designed an ideal heat engine which uses an, ideal gas as working substance., a) Draw a graph showing the variation, of pressure and volume of the, working substance during the, operations of this engine in one cycle., b) A Carnot engine working between, 5270C and 1270 C has a work output of, 800 J per cycle. How much heat is, , OR, 15B. a) Which thermodynamics process is, also called an isoentropic process?, b) The efficiency of a Carnot engine is, , 1,   .If one reducing the temperature of the, 6, 1, sink by 650C, its efficiency becomes  ,  3, ,find the temperature of the sink and the, source., c) Obtain the expression for the work, done during an adiabatic process., [March 2010], 16. Match the following:, a), b), c), d), , A, Mayer’s relation, Isothermal process, Adiabatic process, Absolute scale of, temperature, , B, , TV  1 = Constant, Cp – Cv = R, Lord Kelvin, PV = Constant, V = Constant, , Cp, Cv, , , , [March-2009], 17A. A thermodynamic process is one in, which the thermodynamic variables (P, V, T, etc.) Change., , Page36

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+1 Physics Previous (2009-2016) Questions Chapter Wise, a) Name the thermodynamic process in, which PV  = constant., b) State and explain first law of, thermodynamics., c) Derive an expression for the work, done in an adiabatic process, involving an ideal gas in terms of, pressure and volume., , a) State the law of equipartition of, energy., b) What do you mean by ‘mean free, path’? Give an equation for the mean, free path. (1+ 2) [March 2014], 6. A gas is made up of hydrogen and oxygen, molecules., (1+2), a) Which molecules moves faster?, , OR, 17B. A heat engine is a device which converts, heat energy into work., a) What is the working substance in an, ideal heat engine?, b) Draw the indicator diagram for the, Carnot cycle. Mention the process, involved in the cycle., c) Derive an expression for the, efficiency of a Carnot engine in terms, of source and sink temperatures., [March-2009], , b) Find the ratio of the velocities of, hydrogen and oxygen molecules. [Imp-2013], 7. Kinetic theory of gases is based on the, molecular picture of matter., a) Write any two postulates of kinetic, theory of gases., b) Write short note on:, i) Equipartition of energy., ii) Mean free path, , [March-2013], , 8. The volume temperature graph of a certain, amount of perfect gas at two pressures P1 and, P2 are shown. Which pressure is larger P1 or, P2 ? Give Reason., (2), , Chapter -13, Kinetic Theory of Gases, 1. What do you understand by the term,, mean free path of molecules? Name the, factors on which it depends., (2), [SEPT-2016], 2. Write four postulates of kinetic theory of, gases. (2), [March 2016], 3. “No real gas is truly ideal”., a) When does a real gas approach ideal, gas behaviour?, (1), b) Define the law of equipartition of, energy., (1), [March 2015], 4. a) Write the ideal gas equation., b) Write any four postulates of the kinetic, theory of gases. (1 + 2), [Imp-2014], , OR, Absolute zero is the minimum temperature, that can be reached by a system. Explain why, temperature below absolute zero is not, possible., (2), [Imp-2011], 9. a) According to the kinetic theory of gases,, the molecules of a gas are identical and in, random motion. The collisions made by these, molecules on the walls of the container exert, pressure on the walls., Deduce an expression for the pressure of an, ideal gas and also find at what temperature the, r.m.s. speed of hydrogen is double its value at, STP., , 5. According to the kinetic theory of gases,, gas molecules are always in random motion., Page37

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+1 Physics Previous (2009-2016) Questions Chapter Wise, b) For a gas r =, , 3, and R is the universal, 2, , gas constant, find the values of CP and CV., [March – 2011], , c) Graphically show the variation of, Kinetic energy of a simple pendulum is SHM, with its position. (1), [SEPT-2016], 2. Motion of a simple pendulum is an, example for simple harmonic motion., , 10. Two vessels of the same size are at the, same temperature. One of them contains 1 kg, 0f hydrogen (molecular weight 2) and the, other contains 1 kg of nitrogen (molecular, weight 28)., a) Which of the vessels contains more, molecules?, b) In which vessel is the average, molecular speed greater? How many, times greater?, c) Which of the vessels is at higher, pressure? Why?, [ Imp – 2010], 11. a) State the law of equipartition of, energy., b) A sudden expansion or compression is, considered as an adiabatic process as there, will be no time sufficient for exchanging the, heat generated to the surroundings. Now if a, gas is comprised to half its volume first, rapidly and then slowly, in which case the, work done will be greater., c) The root mean square velocity of, molecules of a gads depends on temperature, only. Find the temperature at which r.m.s., velocity of a gas at 00C will get doubled., [ Imp – 2009], , Chapter -14, Oscillations, 1. a) Define Simple Harmonic motion, (SHM)., (1), b) For a SHM, time period T=2s. If, displacement from the mean position is 10, cm, calculate the instantaneous acceleration., (2), , a) What do you mean by simple, harmonic motion?, (2 +2), b) The acceleration due to gravity on, the surface of the moon is 1.7 m/s2, What is the time period of a simple, pendulum on the moon, if its time, period on the earth is 3.5 second?, [March 2016], 3. a) Write the mathematical expression for, the time period of simple pendulum. Derive, it., (3), b) The time period of a simple pendulum, of length L as measured in a lift descending, with the acceleration g/3 m/s2 is ……., , [Imp 2015], 4. a) A particle executing SHM is an example, of .................., (1), i) acceleration of constant magnitude, and direction., ii), acceleration, magnitude and direction., , of, , changing, , iii) acceleration, of, magnitude but constant direction., , changing, , iv), acceleration, of, magnitude but changing direction., , constant, , b) List any two conditions for a motion of, a body to be simple harmonic., (2), c), , An, , SHM, , is, , given, , by, , x  8sin 10 t   / 4  m .At which position, will its kinetic energy become equal to its, potential energy?, (2) [March 2015], , Page38

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+1 Physics Previous (2009-2016) Questions Chapter Wise, 5A. While performing the resonance column, apparatus experiment in a laboratory at a, certain height, you can hear maximum sound, a) Name the physical concept behind it., b) Explain with diagrams, the normal, modes of vibration in the case of air, in an open tube., c) Open pipes are preferred to closed, ones in musical instruments. Why?, (1+3+1), OR, 5B. Time period of a particle in simple, harmonic motion (SHM) depends on the force, constant K and mass m of the particle., a) A simple pendulum executes SHM, approximately. Why them is the time, period of a simple pendulum, independent of the mass of the, pendulum?, b) A man with wristwatch on his hand, falls from the top of a tower. Does the, watch give the correct time during the, free fall? Why?, c) What is the frequency of a simple, pendulum mounted in a cabin that is, freely falling under gravity?, (2+ 1+ 2), , [Imp-2014], , 6. A simple pendulum starts with its bob at, position X, shown in the figure. The bob is, pulled aside to Y and then released. It swings, from Y to Z and back to Y., , .............energy increases. As it moves, from Y to X, some of this energy is, converted, to, ............energy., Throughout the swing from Y to Z, and back to Y, the total energy is, ........... (4 x ½ =2), b) What is the acceleration of the bob, when it is at X?, (1), c) What are damped oscillations? (1), [March 2014], 7. Simple pendulum is an example for a, harmonic oscillator., (1+1+1), a) Define Simple Harmonic Motion., b) What is the expression for the period of, oscillation of a simple pendulum?, c) A girl is swinging on a swing in the sitting, position. How will the period of swing be, affected if she stands up?, [Imp-2013], 8. The motion represent by the equation, , y  t   ACos(t   ), , is, , called, , simple, , harmonic motion (SHM)., a) Which one of the following examples, closely represents SHM? Substantiate your, answer., i) The rotation of the earth about it axis., ii) Oscillations of a swing., b) A vibrating simple pendulum of period T, is placed in a lift which is accelerating, downwards. What is the effect of this on the, time period of the pendulum?, c) The displacement of y (in cm) of an, oscillating particle varies with time t (in sec), according to the equation., , y  2Cos(0.5 t   / 3), a) Take suitable words from the bracket, and fill in the gaps., (Potential, constant, kinetic, different,, work, resonance), To move the bob from X to Y,, .........has to be done on it and its, , Find the amplitude and period of the particle., [March-2013], 9A. Represent Simple Harmonic Motion, graphically., , Page39

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+1 Physics Previous (2009-2016) Questions Chapter Wise, a) Write the differential equation, representing, Simple, Harmonic, Motion., b) Name two examples for simple, harmonic motion., c) A spring with spring constant 1200, N/m is mounted on a horizontal table, as, , shown. A mass of 3 kg is attached to, the free end of the spring. The mass is, then pulled sideways to a distance of, 2 cm and released., , 11. Fill in the blanks:, R=8.3, 1 -1, K, , Jmol-, , r, , CP 7, , CV 5, , F(t)=20Sin(16t, +0.3), , Frequency f=, , Energy=[ML2, T-2], , Frequency=, [T-1 ], , Natural, Oscillation, ω=................., , Damped, Oscillation, k, b2, , m 4m 2, , , , Frequency of Oscillations., Maximum acceleration of the, mass., [Imp-2012], OR, , 9B. a) What is a seconds pendulum?, b) Time period of a particle in SHM is, , T  2, ,  =0.3, Plank’s, Constant, =, , Forced, Oscillation, ω = ωd, [Imp-2011], , Determine:, i., ii., , CV = ....., , m, . A simple pendulum, k, , executes SHM approximately. Why then, the period of pendulum is independent of, mass?, , 12A. The amplitude of oscillation of a simple, pendulum oscillating in air decreases, continuously. This is because of damping. If, the damping force is proportional to the, velocity of the oscillator, derive an expression, for its frequency., ( 3), OR, 12B. Two spring of force constant ‘K1’ and, ‘K2’ are connected to a mass ‘m’ placed on a, horizontal frictionless surface as shown in the, figure. Derive an expression for the time, period of the horizontal oscillation of the, system., (3), , c) What is the frequency of oscillation of, a simple pendulum mounted in a cabin that is, freely falling under gravity?, [Imp-2012], 10. Oscillation of a loaded spring are simple, harmonic motion., a) What do you mean by simple, harmonic motion?, b) Derive an expression for period of, oscillation of a loaded spring., c), A body oscillate with, , , , , S.H.M.is given by x  5Cos  2 t , , , 4 , , calculate the displacement at time,, t=1.5s, [March 2012], , [Imp-2011], 13. Say true or false:, a) The total energy of a body is equal to, the work it can do in being brought to, rest., b) A block of wood is floating in water, its apparent weight is zero., c) Greater the mass of the pendulum bob, shorter is its frequency of oscillation., d) The location of centre of mass of a, system is independent of the frame of, reference used to locate it, , Page40

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+1 Physics Previous (2009-2016) Questions Chapter Wise, i., , [Imp-2011], 14. a) A simple pendulum is an object, suspended by a weightless and inextensible, string fixed rigidly to a support., i., , Under what conditions for the, amplitude, are the oscillations of the, pendulum simple harmonic?, The period of oscillation of pendulum, is T. What will be the period if the, pendulum is suspended in a lift, moving down with acceleration equal, to g/3., , ii., , b) A particle executing SHM possess both, potential energy and kinetic energy. During, the oscillation, the total energy remains, constant. If A is the amplitude of oscillation, of the particle,, i., , Show graphically, the variation of, potential energy and kinetic energy, with displacement., At what displacement are these, energies equal?, [March – 2011], , ii., , 15. The amplitude of a simple harmonic, oscillation is doubled. What change will you, observe in the following physical quantities of, the oscillator?, a), b), c), d), , Period, Maximum velocity, Maximum acceleration, Total energy., [ Imp – 2010], , 16. The motions that repeat themselves are, called periodic motions but for a simple, harmonic motion, the force must be, proportional to the displacement and it is, directed towards the centre of motion., a) Write an example for a periodic, motion that is not a simple harmonic., b) Write the expression for a period of, oscillation of :, i., A loaded spring, ii., A simple pendulum, c) A particle executes a SHM of, amplitude ‘a’., , ii., , At what distance from the mean, position is its kinetic energy, equal to its potential energy?, At what points is its speed half the, maximum speed?, [March 2010], , 17. a) A particle of mass m (bob), suspended, from one end of and in extensible string on, negligible mass from a rigid support, form a, simple pendulum. If T is period of oscillation, of a simple pendulum show that the time taken, by the bob to go directly from its mean, position to half the amplitude is T/12., b) Arrive at an expression for the period of, oscillations of a simple pendulum. Using the, result explaining whether three students,, finding the period of oscillations of simple, pendulums of same length but with bobs of, different masses will get the same value for, period of oscillations or not., c) Explain what happens to the period of, oscillation, if the point of suspension of the, simple pendulum., i., ii., , iii., iv., v., , Moves vertically upwards with an, acceleration f., Moves downwards vertically with, acceleration less than the acceleration, due to gravity., Falls freely under gravity., Moves, horizontally, with, an, acceleration f., Is taken to a high equal to the radius, of earth (experiment to find the period, of oscillations is done at height equal, to the radius of earth)., [ Imp – 2009], , 18. Ramu tied a spherical pot with a string, and suspended on a clamp. He then filled it, with water. Length of the string is 90 cm and, radius of the pot is 10 cm. He then slightly, displaced the pot to one side and made it to, oscillate., a) Name the system to which the above, system is identical., b) Calculate the period of oscillation of, pot., , Page41

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+1 Physics Previous (2009-2016) Questions Chapter Wise, c) Ramu made a small hole at the, bottom of the pot, so that there is a, steady leakage of water and found, that the period of oscillation, increases. But, when the water is, completely drained out, the period, suddenly decreased to the original, value. Give reasons for the above, variations., [March -2009], , ii) Standing wave, iii) Newton’s law of cooling, iv) Resonance, , b) Obtain a general expression for the, apparent frequency of the siren as heard by the, boy., (3), 4. Fill in the blanks., , Waves, 1. A woman is travelling in a, car at a speed of 25 m/s. She is moving, away from a source producing a sound of, 512Hz., a) Calculate the frequency of sound, heard by her. (speed of sound in air =, 340 m/s), (1), b) Name the phenomenon that explains, this variation in frequency., (1), c) Draw the second harmonic of an, open pipe (both end open). Mark, node and an antinode in the figure., (2), [SEPT-2016], 2. In resonance column experiment, we can, hear maximum sound at a certain height., This is due to the phenomenon of, resonance., (2+2), a) Show that for a pipe closed at one, end, the frequencies are in the ratio, , v1 : v2 : v3  1: 3: 5., b) Open pipes are preferred to closed, pipes in musical instruments. Why?, [March 2016], 3. The pitch of the siren of a fire engine, increases as it approaches a boy standing at, bus stop., [Imp 2015], a) The phenomenon behind it, is due, to……….., , Frequency v , , (3), , iˆ  iˆ =......, , iˆ . iˆ = 1, , iˆ . iˆ = 1, , Chapter -15, , (1), , 1, T, , ....=, , 2, , , Angular, frequency, , , Two strings A and, B are vibrating, together., Frequency of, string A, decreasing from, 324Hz, , Fixed, frequency, of string B, = ........Hz, , 2, T, , Number of, beats, increasing, from 6 per, second., , [March 2015], 5. A transverse harmonic wave on a string is, described by, , y  x, t   3.0sin  36t  0.018   / 4 , Where x and y are in centimetres and t in, seconds. The positive direction of x is from, left to right. (1+1+2), a) Is this a travelling wave or a, stationary wave?, b) If it is travelling, what is the speed, and direction of its propagation/, c) What is its amplitude and frequency?, d) What is the initial phase at the origin?, [Imp-2014], 6. The equation for a wave is given below., y  A Sin( kx  t ) . (1+ 1+ 2), a) It is a travelling or stationary wave?, b) Draw the stationary waves in a, stretched string in the second, harmonic., , i) Doppler effect, Page42

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+1 Physics Previous (2009-2016) Questions Chapter Wise, c) Show that the fundamental frequency, of an open pipe is twice the, fundamental frequency of a closed of, the same length., [March 2014], , three harmonics are in the ratio of, v 1 : v 2 : v 3 =1 : 3: 5., c), Open pipes are preferred to, closed ones in musical instruments., why?, [March 2012], , 7. A sound travelling along a string is, described by y = 0.005 sin (80.0 x -3.0 t)., , 11. In a Laboratory Raju uses a tuning fork in, resonance column experiment., , a) Calculate:, i) Amplitude, , (1), , ii) Wavelength (1), , b) Where will a man hear a louder sound in, the case of stationary wave (node or, antinode)? Why?, (1), [Imp-2013], 8. A student plucks at the centre of a stretched, string and observes the wave pattern, produced., a) What type of wave is produced in the, string?, b) Plot the above wave pattern pictorially., Label the nodes and antinodes on the pattern., [March-2013], 9. A transverse harmonic wave on a string is, described by, , Y ( x, t )  3.0 sin(36t  0.018 x , , , ) , where, 4, , x and y are3 in centimetres and t in seconds., The positive direction of x is from left to right., a) Is it is travelling or stationary wave?, b) What are its amplitude and, frequency?, c) What is the initial phase at the origin?, d) If it is a travelling wave, what are the, speed and direction of its, propagation?, [Imp-2012], 10. While conducting a resonance column, experiment in the laboratory, you can hear the, maximum sound at a certain height., a) Explain the phenomenon of, sound., b) Show that in a closed pipe at one, end, the frequencies of the first, , a) Why type of wave is produced by the, tuning fork in this case?, b) Mention any four characteristics of, these waves., [Imp-2011], 12. a) Wave motion is a propagation of energy, through a material medium due to repeated, periodic motion., i., ii., , Transverse waves cannot be, propagated through gases. Why?, What was the condition assumed by, Laplace in correcting Newton’s, equation for the velocity of sound in, a gas? Write the Newton’s-Laplace, equation., , b) A source of sound of frequency 256 Hz, is in –between a listener and a wall. If the, source is moving towards the wall with a, velocity of 5 ms-1, how many beats per second, will be heard if the sound travels with a speed, of 330ms-1?, [March – 2011], 13. A flute is an example of an open pipe., a) Sketch the pattern of wave forms of, the first two harmonics formed in an, open pipe., b) Show that in an open pipe the, frequencies of the first three, harmonics are in the ration 1:2:3, [ Imp – 2010], 14. a) Depending on the direction of the, displacement caused in the medium and that, of direction of propagation, we can have, transverse and longitudinal waves in solids., But we can have only longitudinal waves in, fluids. Why?, b) For a passenger standing in a railway, station, the frequencies of the whistle of the, train differ as it approaches and moves away, Page43

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+1 Physics Previous (2009-2016) Questions Chapter Wise, from him. This apparent change in frequency, due to the relative motion of the source or, observer is called Doppler effect. Find a, general expression for the apparent frequency., Using this expression explain the variation of, frequency., i., ii., , When the source of sound is moving, and listener is stationary., When listener is moving and the, source is stationary., , c) If the apparent frequency of the whistle, of an engine changes in the ratio 5:4 as the, engine passes a man at rest in the railway, station, find the velocity of the train. (The, velocity of sound is 340 m/second.), 15. A train is approaching the station blowing, its siren. A man standing on the platform, observes a change in frequency of the sound, produced., a) What is this phenomenon called?, b) Write down the expression for the, apparent frequency heard by a, stationary observer when the source, is approaching him with a velocity, ‘u’., c) Write the general expression for a, plane progressive wave., d) Distinguish between transverse and, longitudinal waves. Give one, example for each., [March-2009], , Saju K John M.Sc. Physics, NET, Doctoral Research Fellow at NIT Calicut, , Page44